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Transmitter Device #4492878

Leading Manufacturer, Supplier & Retailer of 629 Wet Differential Pressure Transmitter, 647 Wet Differential Pressure Transmitter, 631B Capsuhelic Wet Differential Pressure Transmitter, 655A 316 Wet Differential Pressure Transmitter and 616C Differential Pressure Transmitter.

629 Wet Differential Pressure Transmitter

629 Wet Differential Pressure Transmitter
  • Product Applications Monitor Differential Pressure Across: Flow Elements, Heat Exchangers, Filters, Pumps, Coils, Compressors
The Series 629 Differential Pressure Transmitter monitors differential pressure of air and compatible gases and liquids with 0.5% accuracy. The design employs dual pressure sensors converting pressure changes into a standard 4-20 mA output signal for two wire circuits. Small internal volume and minimum moving parts result in exceptional response and reliability. Terminal block zero and span adjustments are easily accessed under the top cover. The Series 629 Differential Pressure Transmitter is designed to meet NEMA 4X (IP66) construction.
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647 Wet Differential Pressure Transmitter

647 Wet Differential Pressure Transmitter
Monitor differential pressure in airliquid flow systems, HVAC automation, pneumatic systems and process control with the Series 647 WetWet Differential Pressure Transmitter. Units are temperature compensated and provide a 4 to 20 mA output signal which can be interfaced with chart recorders, data loggers and computerized monitoring and control systems.
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631B Capsuhelic Wet Differential Pressure Transmitter

631B Capsuhelic Wet Differential Pressure Transmitter
  • Product Applications Refrigeration Equipment
  • Energy and Water Management Liquid Level in Water Storage Tanks
The Dwyer Series 631B Capsuhelic Differential Pressure Transmitter monitors differential pressure of air and compatible gases and liquids with accuracy. The design employs converting pressure changes into a standard 4-20 mA output signal for two wire circuits. Digital push-button, zero and span adjustments are easily accessed on the front cover. The Series 631 Differential Pressure Transmitter is designed to meet NEMA 4X (IP66) construction. Robust housing offers 500 psi static pressure rating on ranges down to 0.5" w.c.
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655A 316 Wet Differential Pressure Transmitter

655A 316 Wet Differential Pressure Transmitter
Series 655A Differential Pressure Transmitters are designed for high staticlow DP applications designed especially for the End Users and OEM's where extreme overpressure and high performance of 0.25% accuracy and stability are required at ranges down to 3" w.c. Every 655A Series is built using advanced manufacturing techniques to ensure symmetry between the HI and LO ports. Symmetry, along with automated welding procedures give these differential pressure transmitters excellent performance and reliability over time at high elevated line pressure. Each unit includes a 6-point NIST certificate of calibration which demonstrates the unit's high level of performance. The 655A Series transmitter pressure ports that are all welded 316 SS with an O-Ring free design making it ideal for high cyclical applications, capillary filled systems, or applications where a guaranteed leak free system is needed.
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616C Differential Pressure Transmitter

616C Differential Pressure Transmitter
  • Product Applications Compact housing makes unit ideal for variable air volume systems.
Series 616 Transmitter features an exceptional 0.25% accuracy in several factory calibrated ranges. Choose the one just right for your application. Span and Zero controls included for fine tuning and minor re-calibration in the field. Series 616C Transmitter features an exceptional 1% accuracy in several factory calibrated ranges. Choose the one just right for your application. Span and Zero controls included for fine tuning and minor re-calibration in the field.
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Series 616D Differential Pressure Transmitter

Series 616D Differential Pressure Transmitter
  • Product Applications Compact, DIN rail housing allows unit to be easily mounted in HVAC control panel.
The Series 616D Differential Pressure Transmitter senses the pressure of air and compatible gases and sends a standard 4-20 mA output signal. The 616D housing is specifically designed to mount on a 35 mm DIN rail in a panel. This mounting style allows for several units to be mounted closely together reducing required space. A wide range of models are available factory calibrated to specific ranges. The span and zero controls are for use when checking calibration. They are not intended for re-ranging to a significantly different span. Versatile circuit design enables operation in 2-wire current loops.
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Series 607D DIN Rail Mount Differential

Series 607D DIN Rail Mount Differential
The Series 607D DIN Rail Mount Differential Pressure Transmitter senses the pressure of air and compatible gases and sends a standard 4 to 20 mA output signal. The 607D housing is specifically designed to mount on a 35 mm DIN rail in a panel. This mounting style allows for several units to be mounted closely together reducing required space. A wide range of models are available factory calibrated to 0.25% full scale accuracy in ranges from the very low 0.1 in w.c. to 25 in w.c. The span and zero controls are for field calibration. Units also include redgreen LED status of proper transmitter operation. Versatile circuit design enables operation in 2-wire current loops.
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668 Differential Pressure Transmitter

668 Differential Pressure Transmitter
  • Product Applications Compact housing ideal for variable air volume systems.Bi-directional ranges suited to measure building pressures.
Our low cost Series 668 Differential Pressure Transmitter is capable of measuring low pressures with a 1% accuracy - ideally suited for proper building pressurization and air flow control. Transmitters can withstand up to 10 psig overpressure with no damage to the unit. Variable capacitance sensor design provides excellent sensitivity and long-term stability. Compact, lightweight design makes installation simple and easy. Units also feature reverse-polarity protection.
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648C Differential Pressure Transmitter

648C Differential Pressure Transmitter
The Series 648B and 648C Differential Pressure Transmitters are designed to be used with clean, dry air and other non-corrosive gases. Each unit features a push-activated zero function and an associated LED light indicator. With the convenient push-button, zero calibration can be performed without any additional equipment, which significantly reduces time and cost for users. The dual color LED indicates if the transmitter is at normal operation, overpressure, or in the process of zero calibration. The enclosure consists of a flame retardant plastic top cover and a stainless steel bottom plate for ruggedness. The pressure ranges vary from 0.1 in w.c. to 25 in w.c. unidirectional and 0.25 in w.c. to 5 in w.c. bidirectional. Series 648B comes standard with 0.8% FS* accuracy, while 648C models are available in 0.4% FS* accuracy for more demanding applications. Wiring time is reduced with the removeable terminal block. Each unit features a 2-wire 4 to 20 mA output that is fully protected against short circuiting and incorrect wiring.
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Series 646B Differential Pressure Transmitter

Series 646B Differential Pressure Transmitter
  • Product Applications VAV Systems, Filter Monitoring, HVAC Fan Control, Building Pressurization, Leak Detection.
The Series 646B Differential Pressure Transmitter is designed to be used with clean, dry air and other non-corrosive gases. Each unit features a flame retardant enclosure and a unique design which is suitable for circuit board mounting. Series 646B measures differential pressure at an accuracy of 2.0% FS down to 0.5 in w.c. The transmitter contains a stainless steel sensor that provides resistance against corrosion combined with excellent performance and long term stability. The Series 646B transmitter features excellent stability, low hysteresis, accurate operation over a broad temperature range, and exceptional insensitivity to vibration. These features make the transmitters perfect for VAV systems, filter monitoring, HVAC fan control, building pressurization, and leak detection systems.
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Series 677B Differential Pressure Transmitter

Series 677B Differential Pressure Transmitter
Series 677B Differential Pressure Transmitters are designed to measure pressures as low as 0.1 in w.c. with 0.4% accuracy. Use Series 677B for building energy management systems, environmental pollution control, oven pressurization, lab and fume hood control, HVAC and VAV applications. The transmitter features 15 psid overpressure, reverse polarity protection and EMIRFI protection. Internal regulation permits use with unregulated DC power supplies. The NEMA 4 housing allows for versatile mounting locations and integral mounting tabs simplify installation.
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Series DM-2000 Differential Pressure Transmitter

Series DM-2000 Differential Pressure Transmitter
  • Product Applications Filter monitoring, Fan pressure indication, Duct static pressures, Bi-direction ranges ideal for sensing fluctuating building pressure.
The Dwyer Series DM-2000 Differential Pressure Transmitter senses the pressure of air and compatible gases and sends a standard 4-20 mA output signal. The DM-2000 housing is specifically designed to mount in the same diameter cutout as a standard Magnehelic gage. A wide range of models are available factory calibrated to specific ranges. Pressure connections are inherent to the glass filled plastic molded housing making installation quick and easy. Digital push-button zero and span simplify calibration over typical turn-potentiometers. An optional 3.5 digit LCD shows process and engineering units. A single bush button allows field selection of 4 to 6 engineering units depending on range.
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Series 605 Magnehelic Differential Pressure Indicating Transmitter

Series 605 Magnehelic Differential Pressure Indicating Transmitter
  • Product Applications Monitor pressures in ducts, rooms, or total building pressures, Filter monitoring, Local indication of clean room pressures with process signal sent to control room.
The Series 605 Magnehelic Indicating Transmitter provides for both visual monitoring and electronic control of very low differential pressure. The Series 605 is ideal for control applications in building HVAC systems where local indication is desired during routine maintenance checks or necessary when trouble shooting the system. The easily read dial gage is complimented by the two-wire, 4-20 mA control signal utilizing the time-proven Dwyer Magnehelic gage mechanical design and Series 600 transmitter technology. The two-wire design with terminal strip on the rear simplifies connection in any 4-20 mA control loop powered by a 10-35 VDC supply.
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Series 616KD Differential Pressure Transmitter

Series 616KD Differential Pressure Transmitter
The One-Touch Differential Pressure Transmitters are cost-effective, compact transmitters that reduce up front costs as well as expenses over the life of the product. These instruments not only alleviate cumbersome turn pots typically found in most transmitters, but eliminate entirely the need to span the instrument during calibration. With a single digital push button, both ZERO AND SPAN are calibrated properly, nothing else is required. No additional reference pressure sources and separate calibration devices are necessary; no need to remove from service and send to a lab. All that is required of the installer or user is to let the unit sit at zero reference pressure, then push a button. That is it! The transmitter is now ready for operation. Time savings are enormous over the life of the product compared to traditional transmitters which require time to annually remove the product from service plus the additional time to actually perform a complete full-span calibration. Mounting is simple with integral mounting holes on the 616KD that are inherent to the molded housing. The 616KD has the expanded capability to be mounted on a 35 mm DIN rail either via its side or back integral DIN rail clips. The Series 616KD has easy-to-wire open screw terminals at the top of the housing. An optional protective cap snaps directly to housing to cover terminals. The One-Touch family of Differential Pressure Transmitters are ideal for building automation applications such as air handlers, duct pressure, variable air volume and filter monitoring. Available models include ranges from 1 in w.c. to 20 in w.c. depending on series.
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Series 628CR Pressure Transmitter

Series 628CR Pressure Transmitter
  • Product Applications Pump Monitoring, Compressors, Irrigation Equipment, HVAC, Pneumatic Systems
Accurate to 1% of full scale, The Series 628CR Pressure Transmitter, contains a low cost ceramic sensor housed in a compact, rugged, NEMA 4X stainless steel body. Ideal for the budget conscious OEM's that require high levels of performance, reliability and stability at an unbeatable price. The 628CR housing is small and lightweight for optimum compatibility with OEM systems. The design allows for a variety of pressure ranges from 30 to 500 psi and optional electrical connections allowing you to select the right transmitter for your application.
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Series 626 & 628 Industrial Pressure Transmitter

Series 626 & 628 Industrial Pressure Transmitter
  • Product Applications CompressorsPumping Systems, Irrigation System Pressure Etc.
The Series 626 Pressure Transmitters possess a highly precise 0.25% full scale accuracy piezo-resistive sensor contained in a compact, rugged, NEMA 4X stainless steel general purpose housing or cast aluminum conduit housing. The Dwyer Series 628 Pressure Transmitters are ideal for OEM's with 1% full scale accuracy sensors. The transmitter is also available in the general purpose stainless steel housing and the cast aluminum conduit housing. The corrosion resistant 316L stainless steel wetted parts allow the Series 626 and 628 transmitters to measure the pressure in a multitude of processes from hydraulic oils to chemicals. The Series 626 and 628 are available in absolute and pressure ranges with a variety of optional outputs, process connections and electrical terminations to allow you to select the right transmitter for your application.
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Series 673 Pressure Transmitter

Series 673 Pressure Transmitter
The low cost Series 673 Pressure Transmitter is a fixed range transmitter designed for harsh environments and suitable for high shock and vibration applications. Constructed of stainless steel, the Series 673 provides a 4 to 20 mA output signal with 0.25% accuracy. Use the Series 673 in industrial OEM equipment, hydraulic systems, HVAC equipment, industrial engines and compressor control.
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Series TPT Industrial Pressure Transmitter

Series TPT Industrial Pressure Transmitter
  • Product Applications Process automation and control, Test and measurement equipment Etc.
The Series TPT Pressure Transmitter is the ideal choice for all types of industrial pressure applications. Machined from a solid piece of 17-4PH SS, the TPT provides a leak proof, all metal system without O-rings, welds, or organics exposed to the pressure media. Its design allows for stable operation when subject to shock and vibration. Utilizing piezoresistive technology with digital compensation and temperature correction, the TPT gives high accuracy and stability under harsh environmental conditions. Available in ratiometric and 4 to 20 mA outputs.
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Series 682 Industrial Pressure Transmitter

Series 682 Industrial Pressure Transmitter
The Series 682 Industrial Pressure Transmitter is designed to withstand environmental effects such as shock, vibration, temperature, and EMIRFI. The electronics and capacitive sensor are packaged in a welded stainless steel housing and meets NEMA 4 (IP65) protection ratings. The transmitter features external zero and span adjustments and reverse polarity protection. The Series 682 delivers high performance in tough applications such as off road equipment, hydraulic systems, compressor control, industrial engines, or industrial refrigeration.
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Series 634ES Adjustable Range Pressure Transmitter

Series 634ES Adjustable Range Pressure Transmitter
Series 634ES Transmitters sense a single pressure for air, compatible gas or liquid and provide 4-20 mA output signal. Positive pressure can be measured within an accuracy of 0.5% of span. The Series 634ES uses an isolated piezoresistive pressure sensor to produce a resistance change across a wheatstone bridge. Convenient 2-wire operation simplifies installation. Zero and span adjustments are fully protected inside a rugged die cast aluminum housing with durable gray polyurethane finish. Enclosure is designed to meet NEMA 4X requirements.
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Series 681 Sanitary Pressure Transmitter

Series 681 Sanitary Pressure Transmitter
The Series 681 Sanitary Pressure Transmitter is designed to meet 3A standards for applications in food, dairy, beverage and pharmaceutical processing, liquid level control, and sanitary pipelines. The unit is fully sealed to withstand high pressure wash-down in Clean-in-Place (CIP) and Sterilize-in-Place (SIP) installations. The Series 681 is designed with a unique, no liquid fill diaphragm and a Sanitary Clamp pressure fitting for easy installation with negligible clamping effect. A conduit fitting, shielded cable with vent tube and sealed screws for zero and span adjustment combine to make the Series 681 completely watertight.
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Series 644 Industrial Pressure Transmitter

Series 644 Industrial Pressure Transmitter
  • Product Applications Calibration equipment, Test benches, Pulp and paper mills, Hydraulic/pneumatic controlsTransportation, Power generation
The Series 644 Industrial Pressure Transmitter is a robust transmitter designed for high accuracy pressure applications. Boasting an accuracy of 0.05% FS RSS (
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Series HATX High Accuracy Pressure Transmitter

Series HATX High Accuracy Pressure Transmitter
HATX Pressure Transmitter combines high accuracy with exceptional stability and reliability for environmental tests and measurements. All models come with NIST certificates and are available in barometric, absolute, and gage ranges. These transmitters are ideal for a variety of applications such as weather data systems, laser interferometers, altimeter setting indicators, and engine test cells. Series HATX transmitters consume a very low amount of power and possess an exceptionally fast warm-up and response time. With its excellent consistency and great performance, the HATX transmitter is well suited for the most demanding of applications.
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Series 636 Fixed Range Pressure Transmitter

Series 636 Fixed Range Pressure Transmitter
The Series 636 Pressure Transmitter is a low cost, fixed range, stainless steel transmitter with 0.30% accuracy. It is designed to continuously measure pressure for years in even the toughest environmental and media conditions. Select from 4 ranges to 0-300 psig (0-20 bar) with choice of 4-20 mA output (Model 636) or 1-5 VDC output (Model 636LP). Transmitters are explosion-proof, (FM approved) and meet NACE standards for off-shore applications.
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Series 3200G Explosion-proof Pressure Transmitter

Series 3200G Explosion-proof Pressure Transmitter
The Mercoid Series 3200G Smart Pressure Transmitter is a microprocessor-based high performance transmitter, which has flexible pressure calibration, push button configuration, and programmable using HART Communication. The Series 3200G is capable of being configured with the zero and span buttons, a field calibrator is not required for configuration. The transmitter software compensates for thermal effects, improving performance. EEPROM stores configuration settings and stores sensor correction coefficients in the event of shutdowns or power loss. The Series 3200G is FM approved for use in hazardous (Classified) locations. The 100:1 rangeability allows the smart transmitter to be configured to fit any application.
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Series IS626 Intrinsically Safe Pressure Transmitter

Series IS626 Intrinsically Safe Pressure Transmitter
The Dwyer Series IS626 Intrinsically Safe Pressure Transmitters convert pressure into a standard 4-20 mA output signal. The Series IS626 can be used to accurately measure compatible gases and liquids compatible with its 316316L Stainless Steel wetted parts. Series IS626 full scale accuracy is 0.25%. Designed for industrial environments with a NEMA 4X (IP66) housing, this transmitter resists most effects of shock and vibration. Models are available with a 3' cable or M-12 4 pin connection. The IS626 is UL listed for use in Hazardous (Classified) Locations. The protection method is by Intrinsic Safety, "ia". It was investigated by UL under UL Standard 913 Sixth Edition and CSA Standard No. 157-92.
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Switches DPT Digital Pressure Transmitter

Switches DPT Digital Pressure Transmitter
  • Applications Calibration, Machine tools, Compressors and pumps, Machine building etc.
The Series DPT Digital Pressure Transmitter with Switches combines a large, 14-segment LED display with two programmable solid state switches into one compact unit. A unique, 3-way rotating design allows the DPT to meet specific installation requirements without any retrofitting. The display and electrical connection can be rotated independently to maximize visibility while still orienting the electrical connection in the best position for the cable connector. Large, ergonomically designed push buttons allow for quickeasy programming and thin-film piezoresistive sensor technology guarantees long-term reliability and stability.
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Series RHP-W Wall Mount Humidity Transmitter

Series RHP-W Wall Mount Humidity Transmitter
The Series RHP-W Wall Mount HumidityTemperatureDew Point Transmitter is the most versatile room transmitter on the market. The stylish housing is well vented to provide air flow across the sensor to improve measurement accuracy. An optional LCD display can be integral to the transmitter or a remote display can be ordered for building balancing or LEED validation. The LCD display indicates the ambient temperature along with the humidity or dew point. The transmitter has internal dip switches to select the temperature engineering units and whether the transmitter outputs humidity or dew point. The humidity and temperature sensors are field replaceable to reduce service cost and inventory. The humidity and the dew point are measured using a capacitive polymer sensor that completely recovers from 100% saturation. The humidity and dew point can have either a current or voltage output, while the optional temperature output can be a current, voltage, RTD or thermistor. For models with current or voltage for the temperature output, the temperature range is field selectable. For models with resistive thermistors or RTD outputs, please click here for temperature to resistance lookup tables.
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Series RHP Temperature Transmitter

Series RHP Temperature Transmitter
  • Application For duct mount installations, the sintered filter option should be ordered for applications where the humidity transmitter is mounted in the supply air duct after the fan and cooling coils.
The Series RHP Temperature and Humidity Transmitter combine the voltage or current humidity transmitter output with a passive temperature thermistor or RTD output. The polymer capacitance humidity sensor is not affected by condensation, fog, high humidity, or contaminants. The humidity sensors are available with 2% or 3% accuracies. Duct mounted transmitters are available with an optional two-line alpha numeric LCD display. The Series RHP is available with interchangeable filter options as well as replaceable sensors. For models with resistive thermistors or RTD outputs, please click here for temperature to resistance lookup tables.
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Series RH-R Temperature Transmitter

Series RH-R Temperature Transmitter
The Series RH-R Humidity Transmitter is the ideal transmitter for those applications where space is limited. The compact sensor is protected by a removable filter. It can be mounted up to 16 feet away from the weatherproof base. The Series RH-R is ideal for environmental chambers, rubber bladder burst detection and air handler applications.
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657-1 Relative Temperature Transmitter

657-1 Relative Temperature Transmitter
The Model 657-1 Transmitter provides two 4-20 mA channels to produce separate output signals for both relative humidity and temperature. This inexpensive device delivers 2% accuracy for humidity and 3% for temperature measurements. The sensor employed in the 657-1 features a state-of-the-art integrated polymer film humidity sensor and a thin-film platinum temperature sensor to assure high reliability and rock-solid stability over years of continuous service. Stainless steel probe measures 516" x 10" (0.8 x 24.4 cm) and can be easily mounted to most ductwork using either of the two optional kits.
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Model 657C-1 Relative Humidity Transmitter

Model 657C-1 Relative Humidity Transmitter
The Model 657C-1 Transmitter features the same circuit design as the 657-1 providing two 4-20 mA channels to produce separate output signals for both relative humidity and temperature. However, this model is housed in a tough die cast aluminum protective conduit enclosure with gasketed cover. An internal terminal block is provided for electrical connections. The sensor employed in the 657C-1 features a state-of-the-art integrated polymer film humidity sensor and a thin-film platinum temperature sensor to assure high reliability and rock-solid stability over years of continuous service. Stainless steel probe measures 516" x 9-110" (0.8 x 23.1 cm) and can be easily mounted to most ductwork using either of two optional kits.
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HHT Hazardous Area Humidity Transmitter

HHT Hazardous Area Humidity Transmitter
The Series HHT Hazardous Area HumidityTemperature Transmitter takes accurate measurements in the harshest of environments. The transmitter is offered in explosion-proof and intrinsically-safe versions depending on the application's requirements. The explosion-proof model is offered with 4 to 20 mA output for humidity only. The intrinsically-safe version is offered with 4 to 20 mA output for humidity and temperature. Both versions have an optional two line alphanumeric display to show the current humidity and temperature. The Series HHT humiditytemperature transmitter is excellent for offshore HVAC applications, dust and grain applications. Intrinsically safe models require an intrinsically safe barrier.
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WHT Weather-Resistant Humidity Transmitter

WHT Weather-Resistant Humidity Transmitter
The Compact Series WHT HumidityTemperature Transmitter is designed to withstand the elements. A removable sintered filter protects the polymer capacitance sensor from solid objects that may come in contact with the transmitter. The transmitter is available with 4 to 20 mA or 0 to 10 VDC output signals for both temperature and humidity. This transmitter is ideal for measuring outside air temperature and humidity levels for air handling economizer applications.
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digital pressure transmitter

Digital Pressure Transmitter
The Series DPT Digital Pressure Transmitter with Switches combines a large, 14-segment LED display with two programmable solid state switches into one compact unit. A unique, 3-way rotating design allows the DPT to meet specific installation requirements without any retrofitting. The display and electrical connection can be rotated independently to maximize visibility while still orienting the electrical connection in the best position for the cable connector. Large, ergonomically designed push buttons allow for quickeasy programming and thin-film piezoresistive sensor technology guarantees long-term reliability and stability.
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645 Wet Differential Pressure Transmitter

645 Wet Differential Pressure Transmitter
Series 645 WetWet Differential Pressure Transmitters are designed for use with compatible gases and liquids which can be applied to both the pressure and reference ports. Quick response capacitance sensor delivers a 4 to 20 mA output signal proportional to differential pressure with .25% accuracy. The Series 645 transmitters are ideal for process control, filter condition monitoring, refrigeration equipment, pump speed control, HVAC equipment, and liquid level measurement. For ease of installation and maintenance, order optional 3-valve manifold assembly. Bleed ports allow for total elimination of air in the line and pressure cavities.
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WWDP Differential Pressure Transmitter

WWDP Differential Pressure Transmitter
The Series WWDP Wet-to-Wet Differential Pressure Transmitter offers everything in one package by having 30 field selectable variations in just 3 models. The WWDP provides field selectable unidirectional and bidirectional pressure ranges, configurable 0-5, 1-5, 0-10 VDC, and 4 to 20 mA output. It also provides an auto-zero capability. The field selectable port swap feature eliminates costly replumbing if the unit is improperly installed or if the transmitter is simply replaced. An optional LCD display is available for on-sight indication of line and differential pressure. The all cast aluminum housing is rated NEMA 4 (IP66). These features make the WWDP transmitter an ideal instrument for measuring the flow of various liquids and gases, pressure drop across filters, measurement of liquid level or pressurized vessels, and for use in energy management and process control systems.
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Series 607 Differential Pressure Transmitter

Series 607 Differential Pressure Transmitter
  • Product Applications Leak Detection
  • Clean Room Control Lab and Fume Hood Pressure Control
Series 607 Differential Pressure Transmitter combines very low ranges with exceptional stability, reliability and either 0.25% or 0.5% accuracy for the most demanding applications. Ranges from 0-0.1" to 0-25" w.c. Ultra thin glass clad silicon diaphragm design resists shock and vibration, practically eliminates drift. Certification to NIST standards is included with each unit. Tough stainless steel housing is NEMA 2 rated to protect against moisture and dirt. Use with air and other compatible gases.
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3100D Explosion-proof Differential Pressure Transmitter

  • Product Applications Level monitoring
  • Flow measurement Filter or pump differential pressure and Critical process monitoring
The Mercoid Series 3100D Smart Pressure Transmitter is a microprocessor-based high performance transmitter, which has flexible pressure calibration, push button configuration, and programmable using HART Communication. The Series 3100D is capable of being configured for differential pressure or level applications with the zero and span buttons. A field calibrator is not required for configuration. The transmitter software compensates for thermal effects, improving performance. EEPROM stores configuration settings and stores sensor correction coefficients in the event of shutdowns or power loss. The Series 3100D is FM or ATEX approved for use in hazardous (classified) locations. The 100:1 rangeability allows the smart transmitter to be configured to fit any application.
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636D Fixed Range Differential Pressure Transmitter

  • Product Applications Monitoring Differential Pressure for: Oil & Gas Applications, Level Measurements in Non-Vented Liquid Tanks, Filtration Systems, Compressor Control, Process Control.
The Series 636D Differential Pressure Transmitter can be used for measuring pressures of liquids, gases & vapors. All available ranges have an excellent 0.5% F.S. accuracy with a 4-20 mA Output standard or optional 1-5 VDC output. The NEMA 4 housing is an all 316 welded construction that is designed to withstand the harshest environmental conditions. With all 316L wetted materials, this transmitter is compatible with most media. These units are CSA approved explosion-proof for use in the specified hazardous locations and meet NACE standards for off-shore applications.
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Transmitter Device

We are leaders in the market for providing best range of 629 Wet Differential Pressure Transmitter, 647 Wet Differential Pressure Transmitter, 631B Capsuhelic Wet Differential Pressure Transmitter, 655A 316 Wet Differential Pressure Transmitter and 616C Differential Pressure Transmitter

629 Wet Differential Pressure Transmitter

629 Wet Differential Pressure Transmitter
  • Product Applications Monitor Differential Pressure Across: Flow Elements, Heat Exchangers, Filters, Pumps, Coils, Compressors
The Series 629 Differential Pressure Transmitter monitors differential pressure of air and compatible gases and liquids with 0.5% accuracy. The design employs dual pressure sensors converting pressure changes into a standard 4-20 mA output signal for two wire circuits. Small internal volume and minimum moving parts result in exceptional response and reliability. Terminal block zero and span adjustments are easily accessed under the top cover. The Series 629 Differential Pressure Transmitter is designed to meet NEMA 4X (IP66) construction.
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647 Wet Differential Pressure Transmitter

647 Wet Differential Pressure Transmitter
Monitor differential pressure in airliquid flow systems, HVAC automation, pneumatic systems and process control with the Series 647 WetWet Differential Pressure Transmitter. Units are temperature compensated and provide a 4 to 20 mA output signal which can be interfaced with chart recorders, data loggers and computerized monitoring and control systems.
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631B Capsuhelic Wet Differential Pressure Transmitter

631B Capsuhelic Wet Differential Pressure Transmitter
  • Product Applications Refrigeration Equipment
  • Energy and Water Management Liquid Level in Water Storage Tanks
The Dwyer Series 631B Capsuhelic Differential Pressure Transmitter monitors differential pressure of air and compatible gases and liquids with accuracy. The design employs converting pressure changes into a standard 4-20 mA output signal for two wire circuits. Digital push-button, zero and span adjustments are easily accessed on the front cover. The Series 631 Differential Pressure Transmitter is designed to meet NEMA 4X (IP66) construction. Robust housing offers 500 psi static pressure rating on ranges down to 0.5" w.c.
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655A 316 Wet Differential Pressure Transmitter

655A 316 Wet Differential Pressure Transmitter
Series 655A Differential Pressure Transmitters are designed for high staticlow DP applications designed especially for the End Users and OEM's where extreme overpressure and high performance of 0.25% accuracy and stability are required at ranges down to 3" w.c. Every 655A Series is built using advanced manufacturing techniques to ensure symmetry between the HI and LO ports. Symmetry, along with automated welding procedures give these differential pressure transmitters excellent performance and reliability over time at high elevated line pressure. Each unit includes a 6-point NIST certificate of calibration which demonstrates the unit's high level of performance. The 655A Series transmitter pressure ports that are all welded 316 SS with an O-Ring free design making it ideal for high cyclical applications, capillary filled systems, or applications where a guaranteed leak free system is needed.
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616C Differential Pressure Transmitter

616C Differential Pressure Transmitter
  • Product Applications Compact housing makes unit ideal for variable air volume systems.
Series 616 Transmitter features an exceptional 0.25% accuracy in several factory calibrated ranges. Choose the one just right for your application. Span and Zero controls included for fine tuning and minor re-calibration in the field. Series 616C Transmitter features an exceptional 1% accuracy in several factory calibrated ranges. Choose the one just right for your application. Span and Zero controls included for fine tuning and minor re-calibration in the field.
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Series 616D Differential Pressure Transmitter

Series 616D Differential Pressure Transmitter
  • Product Applications Compact, DIN rail housing allows unit to be easily mounted in HVAC control panel.
The Series 616D Differential Pressure Transmitter senses the pressure of air and compatible gases and sends a standard 4-20 mA output signal. The 616D housing is specifically designed to mount on a 35 mm DIN rail in a panel. This mounting style allows for several units to be mounted closely together reducing required space. A wide range of models are available factory calibrated to specific ranges. The span and zero controls are for use when checking calibration. They are not intended for re-ranging to a significantly different span. Versatile circuit design enables operation in 2-wire current loops.
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Series 607D DIN Rail Mount Differential

Series 607D DIN Rail Mount Differential
The Series 607D DIN Rail Mount Differential Pressure Transmitter senses the pressure of air and compatible gases and sends a standard 4 to 20 mA output signal. The 607D housing is specifically designed to mount on a 35 mm DIN rail in a panel. This mounting style allows for several units to be mounted closely together reducing required space. A wide range of models are available factory calibrated to 0.25% full scale accuracy in ranges from the very low 0.1 in w.c. to 25 in w.c. The span and zero controls are for field calibration. Units also include redgreen LED status of proper transmitter operation. Versatile circuit design enables operation in 2-wire current loops.
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668 Differential Pressure Transmitter

668 Differential Pressure Transmitter
  • Product Applications Compact housing ideal for variable air volume systems.Bi-directional ranges suited to measure building pressures.
Our low cost Series 668 Differential Pressure Transmitter is capable of measuring low pressures with a 1% accuracy - ideally suited for proper building pressurization and air flow control. Transmitters can withstand up to 10 psig overpressure with no damage to the unit. Variable capacitance sensor design provides excellent sensitivity and long-term stability. Compact, lightweight design makes installation simple and easy. Units also feature reverse-polarity protection.
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648C Differential Pressure Transmitter

648C Differential Pressure Transmitter
The Series 648B and 648C Differential Pressure Transmitters are designed to be used with clean, dry air and other non-corrosive gases. Each unit features a push-activated zero function and an associated LED light indicator. With the convenient push-button, zero calibration can be performed without any additional equipment, which significantly reduces time and cost for users. The dual color LED indicates if the transmitter is at normal operation, overpressure, or in the process of zero calibration. The enclosure consists of a flame retardant plastic top cover and a stainless steel bottom plate for ruggedness. The pressure ranges vary from 0.1 in w.c. to 25 in w.c. unidirectional and 0.25 in w.c. to 5 in w.c. bidirectional. Series 648B comes standard with 0.8% FS* accuracy, while 648C models are available in 0.4% FS* accuracy for more demanding applications. Wiring time is reduced with the removeable terminal block. Each unit features a 2-wire 4 to 20 mA output that is fully protected against short circuiting and incorrect wiring.
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Series 646B Differential Pressure Transmitter

Series 646B Differential Pressure Transmitter
  • Product Applications VAV Systems, Filter Monitoring, HVAC Fan Control, Building Pressurization, Leak Detection.
The Series 646B Differential Pressure Transmitter is designed to be used with clean, dry air and other non-corrosive gases. Each unit features a flame retardant enclosure and a unique design which is suitable for circuit board mounting. Series 646B measures differential pressure at an accuracy of 2.0% FS down to 0.5 in w.c. The transmitter contains a stainless steel sensor that provides resistance against corrosion combined with excellent performance and long term stability. The Series 646B transmitter features excellent stability, low hysteresis, accurate operation over a broad temperature range, and exceptional insensitivity to vibration. These features make the transmitters perfect for VAV systems, filter monitoring, HVAC fan control, building pressurization, and leak detection systems.
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Series 677B Differential Pressure Transmitter

Series 677B Differential Pressure Transmitter
Series 677B Differential Pressure Transmitters are designed to measure pressures as low as 0.1 in w.c. with 0.4% accuracy. Use Series 677B for building energy management systems, environmental pollution control, oven pressurization, lab and fume hood control, HVAC and VAV applications. The transmitter features 15 psid overpressure, reverse polarity protection and EMIRFI protection. Internal regulation permits use with unregulated DC power supplies. The NEMA 4 housing allows for versatile mounting locations and integral mounting tabs simplify installation.
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Series DM-2000 Differential Pressure Transmitter

Series DM-2000 Differential Pressure Transmitter
  • Product Applications Filter monitoring, Fan pressure indication, Duct static pressures, Bi-direction ranges ideal for sensing fluctuating building pressure.
The Dwyer Series DM-2000 Differential Pressure Transmitter senses the pressure of air and compatible gases and sends a standard 4-20 mA output signal. The DM-2000 housing is specifically designed to mount in the same diameter cutout as a standard Magnehelic gage. A wide range of models are available factory calibrated to specific ranges. Pressure connections are inherent to the glass filled plastic molded housing making installation quick and easy. Digital push-button zero and span simplify calibration over typical turn-potentiometers. An optional 3.5 digit LCD shows process and engineering units. A single bush button allows field selection of 4 to 6 engineering units depending on range.
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Series 605 Magnehelic Differential Pressure Indicating Transmitter

Series 605 Magnehelic Differential Pressure Indicating Transmitter
  • Product Applications Monitor pressures in ducts, rooms, or total building pressures, Filter monitoring, Local indication of clean room pressures with process signal sent to control room.
The Series 605 Magnehelic Indicating Transmitter provides for both visual monitoring and electronic control of very low differential pressure. The Series 605 is ideal for control applications in building HVAC systems where local indication is desired during routine maintenance checks or necessary when trouble shooting the system. The easily read dial gage is complimented by the two-wire, 4-20 mA control signal utilizing the time-proven Dwyer Magnehelic gage mechanical design and Series 600 transmitter technology. The two-wire design with terminal strip on the rear simplifies connection in any 4-20 mA control loop powered by a 10-35 VDC supply.
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Series 616KD Differential Pressure Transmitter

Series 616KD Differential Pressure Transmitter
The One-Touch Differential Pressure Transmitters are cost-effective, compact transmitters that reduce up front costs as well as expenses over the life of the product. These instruments not only alleviate cumbersome turn pots typically found in most transmitters, but eliminate entirely the need to span the instrument during calibration. With a single digital push button, both ZERO AND SPAN are calibrated properly, nothing else is required. No additional reference pressure sources and separate calibration devices are necessary; no need to remove from service and send to a lab. All that is required of the installer or user is to let the unit sit at zero reference pressure, then push a button. That is it! The transmitter is now ready for operation. Time savings are enormous over the life of the product compared to traditional transmitters which require time to annually remove the product from service plus the additional time to actually perform a complete full-span calibration. Mounting is simple with integral mounting holes on the 616KD that are inherent to the molded housing. The 616KD has the expanded capability to be mounted on a 35 mm DIN rail either via its side or back integral DIN rail clips. The Series 616KD has easy-to-wire open screw terminals at the top of the housing. An optional protective cap snaps directly to housing to cover terminals. The One-Touch family of Differential Pressure Transmitters are ideal for building automation applications such as air handlers, duct pressure, variable air volume and filter monitoring. Available models include ranges from 1 in w.c. to 20 in w.c. depending on series.
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Series 628CR Pressure Transmitter

Series 628CR Pressure Transmitter
  • Product Applications Pump Monitoring, Compressors, Irrigation Equipment, HVAC, Pneumatic Systems
Accurate to 1% of full scale, The Series 628CR Pressure Transmitter, contains a low cost ceramic sensor housed in a compact, rugged, NEMA 4X stainless steel body. Ideal for the budget conscious OEM's that require high levels of performance, reliability and stability at an unbeatable price. The 628CR housing is small and lightweight for optimum compatibility with OEM systems. The design allows for a variety of pressure ranges from 30 to 500 psi and optional electrical connections allowing you to select the right transmitter for your application.
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Series 626 & 628 Industrial Pressure Transmitter

Series 626 & 628 Industrial Pressure Transmitter
  • Product Applications CompressorsPumping Systems, Irrigation System Pressure Etc.
The Series 626 Pressure Transmitters possess a highly precise 0.25% full scale accuracy piezo-resistive sensor contained in a compact, rugged, NEMA 4X stainless steel general purpose housing or cast aluminum conduit housing. The Dwyer Series 628 Pressure Transmitters are ideal for OEM's with 1% full scale accuracy sensors. The transmitter is also available in the general purpose stainless steel housing and the cast aluminum conduit housing. The corrosion resistant 316L stainless steel wetted parts allow the Series 626 and 628 transmitters to measure the pressure in a multitude of processes from hydraulic oils to chemicals. The Series 626 and 628 are available in absolute and pressure ranges with a variety of optional outputs, process connections and electrical terminations to allow you to select the right transmitter for your application.
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Series 673 Pressure Transmitter

Series 673 Pressure Transmitter
The low cost Series 673 Pressure Transmitter is a fixed range transmitter designed for harsh environments and suitable for high shock and vibration applications. Constructed of stainless steel, the Series 673 provides a 4 to 20 mA output signal with 0.25% accuracy. Use the Series 673 in industrial OEM equipment, hydraulic systems, HVAC equipment, industrial engines and compressor control.
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Series TPT Industrial Pressure Transmitter

Series TPT Industrial Pressure Transmitter
  • Product Applications Process automation and control, Test and measurement equipment Etc.
The Series TPT Pressure Transmitter is the ideal choice for all types of industrial pressure applications. Machined from a solid piece of 17-4PH SS, the TPT provides a leak proof, all metal system without O-rings, welds, or organics exposed to the pressure media. Its design allows for stable operation when subject to shock and vibration. Utilizing piezoresistive technology with digital compensation and temperature correction, the TPT gives high accuracy and stability under harsh environmental conditions. Available in ratiometric and 4 to 20 mA outputs.
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Series 682 Industrial Pressure Transmitter

Series 682 Industrial Pressure Transmitter
The Series 682 Industrial Pressure Transmitter is designed to withstand environmental effects such as shock, vibration, temperature, and EMIRFI. The electronics and capacitive sensor are packaged in a welded stainless steel housing and meets NEMA 4 (IP65) protection ratings. The transmitter features external zero and span adjustments and reverse polarity protection. The Series 682 delivers high performance in tough applications such as off road equipment, hydraulic systems, compressor control, industrial engines, or industrial refrigeration.
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Series 634ES Adjustable Range Pressure Transmitter

Series 634ES Adjustable Range Pressure Transmitter
Series 634ES Transmitters sense a single pressure for air, compatible gas or liquid and provide 4-20 mA output signal. Positive pressure can be measured within an accuracy of 0.5% of span. The Series 634ES uses an isolated piezoresistive pressure sensor to produce a resistance change across a wheatstone bridge. Convenient 2-wire operation simplifies installation. Zero and span adjustments are fully protected inside a rugged die cast aluminum housing with durable gray polyurethane finish. Enclosure is designed to meet NEMA 4X requirements.
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Series 681 Sanitary Pressure Transmitter

Series 681 Sanitary Pressure Transmitter
The Series 681 Sanitary Pressure Transmitter is designed to meet 3A standards for applications in food, dairy, beverage and pharmaceutical processing, liquid level control, and sanitary pipelines. The unit is fully sealed to withstand high pressure wash-down in Clean-in-Place (CIP) and Sterilize-in-Place (SIP) installations. The Series 681 is designed with a unique, no liquid fill diaphragm and a Sanitary Clamp pressure fitting for easy installation with negligible clamping effect. A conduit fitting, shielded cable with vent tube and sealed screws for zero and span adjustment combine to make the Series 681 completely watertight.
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Series 644 Industrial Pressure Transmitter

Series 644 Industrial Pressure Transmitter
  • Product Applications Calibration equipment, Test benches, Pulp and paper mills, Hydraulic/pneumatic controlsTransportation, Power generation
The Series 644 Industrial Pressure Transmitter is a robust transmitter designed for high accuracy pressure applications. Boasting an accuracy of 0.05% FS RSS (
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Series HATX High Accuracy Pressure Transmitter

Series HATX High Accuracy Pressure Transmitter
HATX Pressure Transmitter combines high accuracy with exceptional stability and reliability for environmental tests and measurements. All models come with NIST certificates and are available in barometric, absolute, and gage ranges. These transmitters are ideal for a variety of applications such as weather data systems, laser interferometers, altimeter setting indicators, and engine test cells. Series HATX transmitters consume a very low amount of power and possess an exceptionally fast warm-up and response time. With its excellent consistency and great performance, the HATX transmitter is well suited for the most demanding of applications.
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Series 636 Fixed Range Pressure Transmitter

Series 636 Fixed Range Pressure Transmitter
The Series 636 Pressure Transmitter is a low cost, fixed range, stainless steel transmitter with 0.30% accuracy. It is designed to continuously measure pressure for years in even the toughest environmental and media conditions. Select from 4 ranges to 0-300 psig (0-20 bar) with choice of 4-20 mA output (Model 636) or 1-5 VDC output (Model 636LP). Transmitters are explosion-proof, (FM approved) and meet NACE standards for off-shore applications.
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Series 3200G Explosion-proof Pressure Transmitter

Series 3200G Explosion-proof Pressure Transmitter
The Mercoid Series 3200G Smart Pressure Transmitter is a microprocessor-based high performance transmitter, which has flexible pressure calibration, push button configuration, and programmable using HART Communication. The Series 3200G is capable of being configured with the zero and span buttons, a field calibrator is not required for configuration. The transmitter software compensates for thermal effects, improving performance. EEPROM stores configuration settings and stores sensor correction coefficients in the event of shutdowns or power loss. The Series 3200G is FM approved for use in hazardous (Classified) locations. The 100:1 rangeability allows the smart transmitter to be configured to fit any application.
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Series IS626 Intrinsically Safe Pressure Transmitter

Series IS626 Intrinsically Safe Pressure Transmitter
The Dwyer Series IS626 Intrinsically Safe Pressure Transmitters convert pressure into a standard 4-20 mA output signal. The Series IS626 can be used to accurately measure compatible gases and liquids compatible with its 316316L Stainless Steel wetted parts. Series IS626 full scale accuracy is 0.25%. Designed for industrial environments with a NEMA 4X (IP66) housing, this transmitter resists most effects of shock and vibration. Models are available with a 3' cable or M-12 4 pin connection. The IS626 is UL listed for use in Hazardous (Classified) Locations. The protection method is by Intrinsic Safety, "ia". It was investigated by UL under UL Standard 913 Sixth Edition and CSA Standard No. 157-92.
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Switches DPT Digital Pressure Transmitter

Switches DPT Digital Pressure Transmitter
  • Applications Calibration, Machine tools, Compressors and pumps, Machine building etc.
The Series DPT Digital Pressure Transmitter with Switches combines a large, 14-segment LED display with two programmable solid state switches into one compact unit. A unique, 3-way rotating design allows the DPT to meet specific installation requirements without any retrofitting. The display and electrical connection can be rotated independently to maximize visibility while still orienting the electrical connection in the best position for the cable connector. Large, ergonomically designed push buttons allow for quickeasy programming and thin-film piezoresistive sensor technology guarantees long-term reliability and stability.
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Series RHP-W Wall Mount Humidity Transmitter

Series RHP-W Wall Mount Humidity Transmitter
The Series RHP-W Wall Mount HumidityTemperatureDew Point Transmitter is the most versatile room transmitter on the market. The stylish housing is well vented to provide air flow across the sensor to improve measurement accuracy. An optional LCD display can be integral to the transmitter or a remote display can be ordered for building balancing or LEED validation. The LCD display indicates the ambient temperature along with the humidity or dew point. The transmitter has internal dip switches to select the temperature engineering units and whether the transmitter outputs humidity or dew point. The humidity and temperature sensors are field replaceable to reduce service cost and inventory. The humidity and the dew point are measured using a capacitive polymer sensor that completely recovers from 100% saturation. The humidity and dew point can have either a current or voltage output, while the optional temperature output can be a current, voltage, RTD or thermistor. For models with current or voltage for the temperature output, the temperature range is field selectable. For models with resistive thermistors or RTD outputs, please click here for temperature to resistance lookup tables.
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Series RHP Temperature Transmitter

Series RHP Temperature Transmitter
  • Application For duct mount installations, the sintered filter option should be ordered for applications where the humidity transmitter is mounted in the supply air duct after the fan and cooling coils.
The Series RHP Temperature and Humidity Transmitter combine the voltage or current humidity transmitter output with a passive temperature thermistor or RTD output. The polymer capacitance humidity sensor is not affected by condensation, fog, high humidity, or contaminants. The humidity sensors are available with 2% or 3% accuracies. Duct mounted transmitters are available with an optional two-line alpha numeric LCD display. The Series RHP is available with interchangeable filter options as well as replaceable sensors. For models with resistive thermistors or RTD outputs, please click here for temperature to resistance lookup tables.
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Series RH-R Temperature Transmitter

Series RH-R Temperature Transmitter
The Series RH-R Humidity Transmitter is the ideal transmitter for those applications where space is limited. The compact sensor is protected by a removable filter. It can be mounted up to 16 feet away from the weatherproof base. The Series RH-R is ideal for environmental chambers, rubber bladder burst detection and air handler applications.
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657-1 Relative Temperature Transmitter

657-1 Relative Temperature Transmitter
The Model 657-1 Transmitter provides two 4-20 mA channels to produce separate output signals for both relative humidity and temperature. This inexpensive device delivers 2% accuracy for humidity and 3% for temperature measurements. The sensor employed in the 657-1 features a state-of-the-art integrated polymer film humidity sensor and a thin-film platinum temperature sensor to assure high reliability and rock-solid stability over years of continuous service. Stainless steel probe measures 516" x 10" (0.8 x 24.4 cm) and can be easily mounted to most ductwork using either of the two optional kits.
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Model 657C-1 Relative Humidity Transmitter

Model 657C-1 Relative Humidity Transmitter
The Model 657C-1 Transmitter features the same circuit design as the 657-1 providing two 4-20 mA channels to produce separate output signals for both relative humidity and temperature. However, this model is housed in a tough die cast aluminum protective conduit enclosure with gasketed cover. An internal terminal block is provided for electrical connections. The sensor employed in the 657C-1 features a state-of-the-art integrated polymer film humidity sensor and a thin-film platinum temperature sensor to assure high reliability and rock-solid stability over years of continuous service. Stainless steel probe measures 516" x 9-110" (0.8 x 23.1 cm) and can be easily mounted to most ductwork using either of two optional kits.
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HHT Hazardous Area Humidity Transmitter

HHT Hazardous Area Humidity Transmitter
The Series HHT Hazardous Area HumidityTemperature Transmitter takes accurate measurements in the harshest of environments. The transmitter is offered in explosion-proof and intrinsically-safe versions depending on the application's requirements. The explosion-proof model is offered with 4 to 20 mA output for humidity only. The intrinsically-safe version is offered with 4 to 20 mA output for humidity and temperature. Both versions have an optional two line alphanumeric display to show the current humidity and temperature. The Series HHT humiditytemperature transmitter is excellent for offshore HVAC applications, dust and grain applications. Intrinsically safe models require an intrinsically safe barrier.
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WHT Weather-Resistant Humidity Transmitter

WHT Weather-Resistant Humidity Transmitter
The Compact Series WHT HumidityTemperature Transmitter is designed to withstand the elements. A removable sintered filter protects the polymer capacitance sensor from solid objects that may come in contact with the transmitter. The transmitter is available with 4 to 20 mA or 0 to 10 VDC output signals for both temperature and humidity. This transmitter is ideal for measuring outside air temperature and humidity levels for air handling economizer applications.
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digital pressure transmitter

Digital Pressure Transmitter
The Series DPT Digital Pressure Transmitter with Switches combines a large, 14-segment LED display with two programmable solid state switches into one compact unit. A unique, 3-way rotating design allows the DPT to meet specific installation requirements without any retrofitting. The display and electrical connection can be rotated independently to maximize visibility while still orienting the electrical connection in the best position for the cable connector. Large, ergonomically designed push buttons allow for quickeasy programming and thin-film piezoresistive sensor technology guarantees long-term reliability and stability.
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645 Wet Differential Pressure Transmitter

645 Wet Differential Pressure Transmitter
Series 645 WetWet Differential Pressure Transmitters are designed for use with compatible gases and liquids which can be applied to both the pressure and reference ports. Quick response capacitance sensor delivers a 4 to 20 mA output signal proportional to differential pressure with .25% accuracy. The Series 645 transmitters are ideal for process control, filter condition monitoring, refrigeration equipment, pump speed control, HVAC equipment, and liquid level measurement. For ease of installation and maintenance, order optional 3-valve manifold assembly. Bleed ports allow for total elimination of air in the line and pressure cavities.
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WWDP Differential Pressure Transmitter

WWDP Differential Pressure Transmitter
The Series WWDP Wet-to-Wet Differential Pressure Transmitter offers everything in one package by having 30 field selectable variations in just 3 models. The WWDP provides field selectable unidirectional and bidirectional pressure ranges, configurable 0-5, 1-5, 0-10 VDC, and 4 to 20 mA output. It also provides an auto-zero capability. The field selectable port swap feature eliminates costly replumbing if the unit is improperly installed or if the transmitter is simply replaced. An optional LCD display is available for on-sight indication of line and differential pressure. The all cast aluminum housing is rated NEMA 4 (IP66). These features make the WWDP transmitter an ideal instrument for measuring the flow of various liquids and gases, pressure drop across filters, measurement of liquid level or pressurized vessels, and for use in energy management and process control systems.
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Series 607 Differential Pressure Transmitter

Series 607 Differential Pressure Transmitter
  • Product Applications Leak Detection
  • Clean Room Control Lab and Fume Hood Pressure Control
Series 607 Differential Pressure Transmitter combines very low ranges with exceptional stability, reliability and either 0.25% or 0.5% accuracy for the most demanding applications. Ranges from 0-0.1" to 0-25" w.c. Ultra thin glass clad silicon diaphragm design resists shock and vibration, practically eliminates drift. Certification to NIST standards is included with each unit. Tough stainless steel housing is NEMA 2 rated to protect against moisture and dirt. Use with air and other compatible gases.
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3100D Explosion-proof Differential Pressure Transmitter

  • Product Applications Level monitoring
  • Flow measurement Filter or pump differential pressure and Critical process monitoring
The Mercoid Series 3100D Smart Pressure Transmitter is a microprocessor-based high performance transmitter, which has flexible pressure calibration, push button configuration, and programmable using HART Communication. The Series 3100D is capable of being configured for differential pressure or level applications with the zero and span buttons. A field calibrator is not required for configuration. The transmitter software compensates for thermal effects, improving performance. EEPROM stores configuration settings and stores sensor correction coefficients in the event of shutdowns or power loss. The Series 3100D is FM or ATEX approved for use in hazardous (classified) locations. The 100:1 rangeability allows the smart transmitter to be configured to fit any application.
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636D Fixed Range Differential Pressure Transmitter

  • Product Applications Monitoring Differential Pressure for: Oil & Gas Applications, Level Measurements in Non-Vented Liquid Tanks, Filtration Systems, Compressor Control, Process Control.
The Series 636D Differential Pressure Transmitter can be used for measuring pressures of liquids, gases & vapors. All available ranges have an excellent 0.5% F.S. accuracy with a 4-20 mA Output standard or optional 1-5 VDC output. The NEMA 4 housing is an all 316 welded construction that is designed to withstand the harshest environmental conditions. With all 316L wetted materials, this transmitter is compatible with most media. These units are CSA approved explosion-proof for use in the specified hazardous locations and meet NACE standards for off-shore applications.
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