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A L M Engineering & Instrumentation Private Limited
location Kurla, Mumbai, Maharashtra

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Our Products

  1. Transmitter Device 40 Products available
  2. Measurement Gauges & Fittings 23 Products available
  3. Measuring Instruments & Equipment 23 Products available
  4. Pressure Switches 22 Products available
  5. Manometers 15 Products available
  6. Kitchenware And Cookware 10 Products available
  7. Medical Accessories 10 Products available
  8. Anemometer 9 Products available
  9. Process Control Systems & Equipment 6 Products available
  10. Industrial Pump 6 Products available
  11. Others Products 107 Products available

Our Products

Leading Manufacturer, Supplier & Retailer of Dwyer Differential Pressure Switch, MDA Miniature Adjustable Pressure Switch, A7 Mini Pressure Switch, A3000 Photohelic Pressure Switch and AP Diaphragm Operated Pressure Switch.

Hazardous Area Humidity Monitor

Hazardous Area Humidity Monitor
₹ 42,000 / Unit Get Latest Price
  • Accuracy 2.00%
  • Output Value 4-20mA
  • Temperature Range -40 to 140 degree F (-40 to 60 degree C)
  • Storage Temperature -40 to 80 degree C
  • Voltage range 0-10 V
  • Connection size 1/2 inch
  • Weight 1134 g
  • Response Time 15 sec
  • Housing Material Aluminium
  • RH Sensor Capacitance polymer
  • Conduit Connection Female NPT
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Dew Point Transmitter

Dew Point Transmitter
₹ 13,500 / Piece Get Latest Price
  • Application Industrial
  • Accuracy 2%
  • Color White
  • Output voltage 0-10 VDC/4-20 mA
  • Max. pressure 0.07 bar
  • Input voltage 17-36 VDC
  • Supply Voltage 24 VDC/VAV
  • Brand Aerosense
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Dwyer Differential Pressure Switch

Dwyer Differential Pressure Switch
₹ 850 / Piece Get Latest Price
  • Material Plastic
  • Color Grey
  • Media Type Gas
  • Brand Name Honeywell, Schneider, Siemens
  • Type Differential Pressure Switch
  • Water column 20 Pa to 5000 Pa
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DLP Temperature Data Logger

DLP Temperature Data Logger
The Series DLP Data Logger can record pressure and temperature. The 14" NPT fitting comes standard and allows the logger to be adapted to almost any pressure fitting. The internal temperature sensor provides accurate temperature measurements without the need of a separate temperature recorder, and many of the models provide a choice between measuring pressure in psia or psig. The DLP can easily be started and stopped from a PC or delayed to start up to six months in advance. The battery-powered data logger can store over 16, 000 measurements per channel, and the easy to use DL700 software makes retrieving data simple.
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A9 Snap-Action Pressure Switch

A9 Snap-Action Pressure Switch
Series A9 Pressure Switches are designed for controlling pressure with higher current capacity. These switches are used widely in steam cleaners, steam irons, and other pressure control systems. It provides SPDT contact and Series A9 Pressure Switches utilize high-quality miniature snap-action switches. The switch is diaphragm operated, boasting a high temperature rating and compact size.
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Thermal Dispersion Flow Switch

Thermal Dispersion Flow Switch
  • calibrated 0.2 fps
The Series TDS Thermal Dispersion Flow Switch offers solid state flow detection of non-coating liquids for pump and process protection. SPDT output allows for interfacing with remote PLC or relay control device. The adjustable switch point is factory calibrated at 0.2 fps with LED indication of flow and calibration status. Units feature selectable NO or NC operation and are not damaged by over-ranging flow velocities.
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MDA Miniature Adjustable Pressure Switch

MDA Miniature Adjustable Pressure Switch
Sense differential pressure with the Series MDA Miniature Adjustable Pressure Switch. The switch features field adjustable set point and gold inlay contacts. Air or other compatible fluids can be used on the "high side". The lightweight and compact size make the MDA ideal for any application with space constraints. Applications include industrial, HVAC, pump and motor control, medical, automotive, pools and spas.
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Space Mount Carbon Dioxide Transmitter

Space Mount Carbon Dioxide Transmitter
  • Features: Patented, Absorption Infrared Gas sensing engine provides high accuracy in a compact low cost package, Etc.
The Ventostat 8000 Series represents a full range of wall mount CO2 and temperature transmitters with display options plus active humidity and temperature outputs.
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DLI2 LCD Pressure Data Logger

DLI2 LCD Pressure Data Logger
The Series DLI2 accurately records pressure and gives instant remote readings. The large, back-lit LCD and 8-button keypad provide convenient access to current data and recorder setup as well as memory and battery levels. The Series DLI2 can be ordered for absolute or gauge pressure measurements up to 5, 000 psi. Using the keypad or software, measurements can be read in psi, in. Hg, mm Hg, bar, atm, Torr, Pa, kPa, or MPa. The large memory capacity allows over 260, 000 readings to be stored. The easy to use DL700 software makes creating permanent records, performing data calculations, and graphing of data simple. The DLI2 can easily be started and stopped from a PC or delayed to start up to six months in advance. It can also stop recording at a specific time or after a certain number of readings have been taken.
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A7 Mini Pressure Switch

A7 Mini Pressure Switch
Series A7 Mini Pressure Switches have been designed for high current applications. These switches are small and inexpensive, making them ideal for OEM use. The Series A7 switches utilize a high-quality snap-action switch, which is diaphragm actuated. They have a silicone diaphragm and nylon housing. The A7 switches are compact and lightweight which adds to the ease of installation. The set point must be factory set, but a broad operating range makes them great for a variety of applications. Models are built to your specification.Set point is factory preset and is not field adjustable.Minimum quantity order is 100.
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A3000 Photohelic Pressure Switch

A3000 Photohelic Pressure Switch
  • Product Applications Air Conditioner Systems, Clean Rooms, Fume Exhaust Systems
Photohelic SwitchGages function as versatile, highly repeatable pressure switches combined with a precise pressure gage employing the time-proven Magnehelic gage design. The Photohelic switchgage measures and controls positive, negative or differential pressures of air and compatible gases. Standard models are rated to 25 psig (1.7 bar) with options to 35 (2.4) or 80 (5.5 bar) psig. Single pressure 36000S models measure to 6000 psig (413 bar) with a 9000 psig (620 bar) rating. Two phototransistor actuated, DPDT relays are included for lowhigh limit control. Easy to adjust set point indicators are controlled by knobs located on the gage face. Individual set point deadband is one pointer width - less than 1% of full scale. Set points can be interlocked to provide variable deadband - ideal for control of fans, dampers, etc. Gage reading is continuous and unaffected by switch operation, even during loss of electrical power. Choose from full scale pressure ranges from a low 0-.25" (0-6 mm) w.c. up to 30 psi (21 bar); single positive pressure to 6000 psig (413 bar). Photohelic Sensing - How It WorksIn typical applications, these Dwyer switchgages control between high and low pressure set points. When pressure changes, reaching either set point pressure, the infrared light to the limiting phototransistor is cut off by the helix-driven light shutter. The resulting phototransistor signal is electronically amplified to actuate its DPDT slave relay and switching occurs. Dead band between make and break is 1% of full scale or less - just enough to assure positive, chatter-free operation. Relay-Transformer FeaturesA plastic housing protects all electronic components. Solid-state and integrated circuit electronics are on glass-epoxy printed circuit boards and self-extinguishing terminal boards.
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A3000 Photohelic Pressure Switch

A3000 Photohelic Pressure Switch
  • Product Applications Air Conditioner Systems, Fume Exhaust Systems, Clean Rooms
Photohelic SwitchGages function as versatile, highly repeatable pressure switches combined with a precise pressure gage employing the time-proven Magnehelic gage design. The Photohelic switchgage measures and controls positive, negative or differential pressures of air and compatible gases. Standard models are rated to 25 psig (1.7 bar) with options to 35 (2.4) or 80 (5.5 bar) psig. Single pressure 36000S models measure to 6000 psig (413 bar) with a 9000 psig (620 bar) rating. Two phototransistor actuated, DPDT relays are included for lowhigh limit control. Easy to adjust set point indicators are controlled by knobs located on the gage face. Individual set point deadband is one pointer width - less than 1% of full scale. Set points can be interlocked to provide variable deadband - ideal for control of fans, dampers, etc. Gage reading is continuous and unaffected by switch operation, even during loss of electrical power. Choose from full scale pressure ranges from a low 0-.25" (0-6 mm) w.c. up to 30 psi (21 bar); single positive pressure to 6000 psig (413 bar). Photohelic Sensing - How It WorksIn typical applications, these Dwyer switchgages control between high and low pressure set points. When pressure changes, reaching either set point pressure, the infrared light to the limiting phototransistor is cut off by the helix-driven light shutter. The resulting phototransistor signal is electronically amplified to actuate its DPDT slave relay and switching occurs. Dead band between make and break is 1% of full scale or less - just enough to assure positive, chatter-free operation. Relay-Transformer FeaturesA plastic housing protects all electronic components. Solid-state and integrated circuit electronics are on glass-epoxy printed circuit boards and self-extinguishing terminal boards.
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Series THC Temperature Switch

Series THC Temperature Switch
Simultaneously measure and control temperature and humidity with the Series THC TemperatureHumidity Switch. The unit offers a 3-digit red display for temperature indication and a 3-digit green display indicating humidity. The Series THC is equipped with four independent relays, two for temperature control and two relays for humidity control. The unit offers 61 programmable parameters for temperature and humidity control including set point, differential, directreverse acting, cycle time, alarm clock time, and decimal point adjustment. In the event of a probe error, the default operation of the relays can be set to open or close. The THC features error or alarm messaging and password protection. The THC TemperatureHumidity Switch accepts up to two temperature probe inputs (sold separately) and a humidity sensor. A humidity sensor with 0-1V, 0-3V (sold separately), or 4-20 mA output can be used with the Series THC.
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Model CDD Duct Mount Carbon Dioxide Transmitter

Model CDD Duct Mount Carbon Dioxide Transmitter
  • Product Applications On demand room ventilation
The Model CDD Duct Mount Carbon Dioxide Transmitter monitors the occupancy in a room by detecting the concentration of carbon dioxide in the return air duct. The non-dispersive infrared sensing technology automatically updates the calibration of the transmitter using a proprietary logic feature which limits the amount of error due to drift. The Model CDD can measure up to 2000 PPM in duct air flows less than 1500 FPM.
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Series LPTK Gas Pressure Test Kit

Series LPTK Gas Pressure Test Kit
The Series LPTK Gas Pressure Test Kit is ideal for testing LP & natural gas lines and controls. The kit's gage shows if proper pressure is present or if a leak exists. The Series LPTK Gas Pressure Test Kit is available in two different gage ranges, and each gage is 3% full scale accurate with an easy to use calibration screw on the back of the gage. It is easier to use than a manometer, and includes a sturdy case for added durability and safe handling.
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AP Diaphragm Operated Pressure Switch

AP Diaphragm Operated Pressure Switch
Reliable and convenient, series AP pressure switch is a compact for instrument air or other low pressure applications. Visible set point and external adjustment add convenience. Used on air, non-corrosive gas or liquid service compatible with wetted parts. Unit also available in weatherproof and explosion-proof housing.
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DL7 Differential Pressure Data Logger

DL7 Differential Pressure Data Logger
Monitor and Record low differential pressures and temperature with the model DL7 Differential Pressure Data Logger. Unit includes an onboard thermistor for ambient temperature measurement. Sampling rates are user selectable from 0.04 seconds to 8 hours with First-in first-out or Fill-then-stop sampling options. Loggers can store up to 21, 500 readings and operate totally independently from any external power supply with built-in lithium battery. Use Model DL200 Windows software (sold separately) to quickly program the logger or upload data to a computer. The series DL7 logger is ideal for monitoring air duct velocity, testing and balancing HVAC systems, or verifying room pressure.
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Series FAFM Fan Inlet Air Flow Measuring Probe

Series FAFM Fan Inlet Air Flow Measuring Probe
The Model FAFM Fan Inlet Air Flow Measuring Probes use evenly distributed total and static pressure measuring points to deliver an accurate measurement of flows in a fan inlet. The Air Flow Measuring Probes can be completely installed from outside of the fan making it ideal for when proper duct locations are unavailable. With its lightweight and durable construction in addition to its ease of installation, this product lends itself to being used in the HVAC industry. There are two versions of the model FAFM fan inlet air flow probes to choose from depending on the depth of the fan inlet. For fan inlets with depth less than 3-12" (8.89 cm): Please order a fan inlet probe with an "S" suffix. This probe has a diameter of .375" (.95 cm). It employs one total flow measuring tube and one static measuring tube. Each probe is covered with an extruded aluminum anodized coat. Each measuring tube has multiple sensing points. For fan inlets with depth greater than 3-12" (8.89 cm): Please order a fan inlet probe with a "D" suffix. This probe has a diameter of 3-12" (8.89 cm). It employs extruded aluminum anodized coated probes with both total and static sensors on each tube. Please Note: These are sold in sets of two. A set is necessary in order to ensure an accurate reading. No more than two air flow measurement probes will be needed to obtain an accurate reading.
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Series 100 AV Durablock Air Velocity Gage Kit

Series 100 AV Durablock Air Velocity Gage Kit

Designed to measure air velocity, static pressure, vacuum or differential pressure, where the additional range of the 400 Series gages is not required. Series 100 Gages offer superb accuracy combined with portability. The Dwyer Durablock precision machined solid acrylic plastic construction, the wells and inclined bore are machined to tolerances of .0002". Complete Air Velocity Kits Include:Dwyer Inclined Manometer, stainless steel Pitot tube (12" with Models 102 AV & 115 AV), two 9' lengths of rubber tubing with connectors, additional red gage fluid, instruction card H-7, Bulletin H-11 and magnetic mounting clips, air velocity calculator slide rule and carrying case.
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Series AFG Averaging Flow Grid

Series AFG Averaging Flow Grid
  • Applications To display differential pressure, velocity of volume flow using a micro manometer etc.
The Series AFG Flow Grid is an outstanding simple yet accurate cost effective alternative to other duct mounted pressure sensors. Once installed and connected to a suitable measuring instrument, the device will provide years of trouble free monitoring of both air and gas flow. Installing the AFG Flow Grid is quick and easy, the AFG is supplied in kit form to allow both workshop and on-site installation into a wide range of square and circular ducts up to approximately 60". The AFG Flow Grid is a fundamental pressure sensing device designed to transmit a continuous differential pressure signal. When this output is connected to a suitable measuring instrument (i.e., manometer, pressure transducer, etc.), it may be used to determine air velocity and volume flow rate. How the AFG Flow Grid WorksThe AFG Flow Grid consists of two tubes mounted diagonally across a square or rectangular duct, or diametrically across a round duct. The tubes are drilled with a series of equi-spaced holes.
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Series DAFM Duct Air Flow Measuring Probe

Series DAFM Duct Air Flow Measuring Probe
The Model DAFM Duct Air Flow Measuring Probe uses evenly distributed total and static pressure measuring points to deliver an accurate measurement of flows in a duct. The Air Flow Measuring Probe can be completely installed from outside of the duct making it very easy to install. With its lightweight and durable construction in addition to its ease of installation, this product lends itself to being used in the HVAC industry. These air flow measuring probes may be ordered for either round or rectangular ducts. In order to ensure accurate measurements you must determine the number of probes needed for your size duct. If the duct is rectangular, then consult the chart to determine appropriate quantity of probes.
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Series 160E Ellipsoidal Tip Pitot Tube

Series 160E Ellipsoidal Tip Pitot Tube
Series 160E Pitot Tubes are widely used in the U.K. and Europe for applications demanding high accuracy when measuring the flow of air or other compatible gases. Precision crafted tip configuration allows air to pass smoothly with minimum turbulence for consistent, reliable readings. Exterior indicator arm is aligned parallel to the 5 in. (13 cm) sensing tip so you always know that unit is properly positioned inside duct. Sliding depth indicators grip firmly to ensure uniform insertion - critical when making multiple measurements as part of a complete traverse; the best way to determine average velocity. Total and static pressure taps are 14" (6 mm), permanently silver soldered to the connection block, leak-proof and durable.
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Model A-350 Aspirator Bulb

Model A-350 Aspirator Bulb
  • Product Applications Calibration and leak check testing.
The Model A-350 Aspirator Bulb can be used to source pressure for calibration and leak checking tests. Simply squeeze the bulb after the tubing is connected to generate pressure. For applications such as our CO2 indicator, the aspirator bulb can be squeezed before inserting the tubing to draw a vacuum to pull the smoke or air from a duct or stack into the gage.
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Model A-396A Calibration Pump

Model A-396A Calibration Pump
Serves as pressure source to calibrate gages and transmitters or to set pressure switches. Use with manometer or other pressure standard. Includes volume adjuster enabling fine pressure control and bleed valve. Generates pressures from a fraction of an inch w.c. to 72 psig (5 bar). Includes barbed fitting, tee connector and three 36" lengths of vinyl tubing.
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Series HS Humidity Switch

Series HS Humidity Switch
  • Product Applications Industrial Chillers, Environmental Chambers, Walk-ins and Freezers, Heat SealersBeer and Wine Chillers, Mug Frosters Etc.
The microprocessor based Series HS Humidity Switch provides control for humidifying or dehumidifying. Relative humidity, output status, and error messaging can be viewed on the bright green LED. The switch features 9 user defined parameters including setpoint, hysteresis, control type, cycle time, and probe adjustment. Access to programming parameters can be locked for security purposes using the password protection feature. The Series HS includes a fitting clip for panel mounting, gasket, rear terminal cover, and instruction manual.
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SMC-1 Sound Calibrator

SMC-1 Sound Calibrator
Model SMC-1 Sound Calibrator is ideal for setting standard noise levels at 94 dB and 114 dB. The SMC-1 has an output frequency of 1 kHz, 4%. This unit functions best when environment conditions have a temperature of 68F (20C), relative humidity of 65%, and an atmospheric pressure of 29.9" Hg (1013 mbar). The SMC-1 features a measuring accuracy of 0.5 dB, a low battery indicator, and a 12" microphone adapter. This calibrator has a compact design that allows the user to conveniently operate and store the product. At 10 oz (283 g) including the battery, the SMC-1 is also extremely lightweight. Each unit includes carrying case, battery, and instruction manual. This calibrator is ideal for calibrating sound meters such as the Dwyer Series SM-100.
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Series MAFS Metal Averaging Flow Sensor

Series MAFS Metal Averaging Flow Sensor
The Series MAFS is ideal for use with Dwyer Instruments, Inc. precision air velocity gages, transmitters and switches. The Series MAFS uses evenly distributed total and static pressure measuring points to deliver an accurate measurement of flows in a duct. The blade profile provides enhanced performance with minimal flow disruption in the air stream. The air flow measuring probe can be completely installed from the outside of round or circular ducts, making it very quick to install. With its lightweight and durable construction, in addition to its ease of installation, the MAFS flow sensor lends itself superbly to applications in the HVAC industry.
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Model 920 Smoke Gage Kit

Model 920 Smoke Gage Kit
Easy to use Smoke Gage Kit enables you to quickly balance maximum CO2 with minimum smoke for clean, efficient combustion. Simply take and actual sample of the smoke being tested and compare it to the standards on the Smoke Chart included. Just 10 full strokes of the pump produce and accurate test sample. Complete testing instructions are included.
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Series AVFS Air Flow Switch

Series AVFS Air Flow Switch
  • Product Applications Fan monitoring, Damper feedback, Filter monitoring, Air handlers.
The new Series AVFS Adjustable Air Flow Switch complements the Dwyer Instruments line of thermo-anemometer transmitters and handheld instruments. The AVFS is specifically designed to monitor air flow in ducts and provides a 3A contact output to indicate a change or loss of flow. Simply turn on the fan or air handling unit and adjust the set-point via the potentiometer to show normal status. Then alter a damper or decrease fan speed to activate the AVFS. The AVFS will signal a loss of flow and the N.O. SPST output will indicate the detected decrease. For ease of installation and system troubleshooting, the Series AVFS possesses a redgreen LED indication to provide local status if the air flow is above (green) or below (red) the set-point. The AVFS provides a 5% set-point repeatability across a full scale range of 1-10 ms (197-1969 fpm) and includes a mounting bracket for quick duct mounting. The AVFS Series Adjustable Air Flow Switches come in a compact, rugged PBT enclosure that is rated NEMA 4X (IP65), making them ideal for any ventilation system installation or similar BAS application.
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Series PAFS-1000 Averaging Flow Sensor

Series PAFS-1000 Averaging Flow Sensor
  • Applications Zone control in HVAC systems
The Series PAFS-1000 Averaging Flow Sensor is ideal for sensing differential pressure in the inlet section of variable air volume terminal units and fan terminal units. Units can also be used to sense differential pressure at other locations in the main or branch duct systems. The "H" port senses total pressure and the "L" port senses static pressure. The difference between these signals is the differential, or velocity pressure. For models PAFS-1002 to PAFS-1005, up to four sensing points and lengths of 3-532" to 9-2932" (8.02 to 25.26 cm) to accommodate box size diameters of 4" to 16" (10.16 to 40.64 cm) are available. For models PAFS-1006 to PAFS -1011, up to 10 sensing points and lengths from 12-12" to 23-2932" (31.75 to 60.72 cm) are available to accommodate appropriately sized duct dimensions.
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1640 Floating Contact Null Switch

1640 Floating Contact Null Switch
The unique electric switch design in the 1640 is another Dwyer Instrument, Inc. innovation. The Dwyer Model 1640 Differential Pressure Switch resembles the Series 1630 switches. However, the Model 1640 is equipped with a single pole, double throw floating contact switch (not snap acting) so it functions as a null switch. Drawing shows the switching action schematically. As the diaphragm moves in response to pressure changes, it moves the floating contact to cause switching action at two preset points with no switching action between these points. The "high" circuit will be closed when rising pressure differential reaches the preset level. The "low" circuit will be closed when falling pressure differential reaches the preset level. A typical example of usage is to position motorized dampers when static pressure in a duct system reaches a desired maximum and reposition the dampers when the static pressure falls to a pre-established minimum. By using a Pitot tube sensing element the Model 1640 switch can serve in the same way to control air velocity and maintain a constant volume of air in a supply duct. CAUTION: FOR USE ONLY WITH AIR OR COMPATIBLE GASES
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Series MC Multi-Cal Pressure Calibrator

Series MC Multi-Cal Pressure Calibrator
  • Applications Clean Room ControlFilter Performance Monitoring, Draft Measurement, Airflow Measurement Control etc.
Series MC Portable Multi-Cal Pressure Calibrator performs a wide variety of simple and complex pressure based measurement, test, and calibration operations. Modular sensor design allows user to select pressure measurement range for application flexibility. Calibrator can accommodate up to two interchangeable pressure modules (sold separately below) in any combination of range or accuracy. Simultaneously display two separate measurements on the two line, alphanumeric display. Readings can be displayed in a choice of seven preprogrammed engineering units or any single user-defined unit. Calibrator features minmax recall, hilo alarm, percentage of full scale pressure readings, mAvoltage measurement, leak rate and pressure decay measurement, switch testing capabilities, including trip point and dead band, and velocityvolume flow rates. Quickly document calibration procedures using the data logging feature which stores up to 384 sets of pressure and timedate stamped measurements. Easily upload stored data to an IBM compatible computer via the RS232 port. Calibrators and modules include certification to NIST traceability - ideal as a secondary standard for calibrating pressure equipment. Multi-Cal Pressure Calibrator includes utility software, test leads, protection module, adjustable had strap, AC adapter, batteries, instruction manual, and hard carrying case. Multi-Cal Pressure Modules are interchangeable and available in a wide selection of pressure ranges and accuracies. Handheld calibrator accepts up to two pressure modules. Modules include NIST calibration certification.
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MM10 Digital Multimeter

MM10 Digital Multimeter
Our compact, low cost Model MM10 Digital Multimeter is ideal for general electrical testing and troubleshooting. This full function multimeter measures DC and AC voltage to 600V, DC current to 10A and resistance to 20 M. In addition to volts, amps and ohms, this meter includes audible continuity, diode, LED and transistor hFE tests. Rotary switch allows you to select from any of the twenty ranges quickly and easily. The 3.5 digit LCD features automatic polarity correction, low battery and overload indication. Rugged, high impact case comes equipped with built-in tilt-stand for versatile, hands-free operation. Overload protected to 600 VAC600 VDC for voltage ranges and to 500 VAC500 VDC for resistance, diode and continuity test ranges. Current ranges are protected by 0.5A250V, replaceable fuse. Multimeter is furnished with 22" test leads, 9V battery and instruction manual.
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Series 1620 Dual Pressure Switch

Series 1620 Dual Pressure Switch
Our old faithful switch design is still best where highest precision combined with diaphragm sealed leak proof construction and mounting simplicity are required. Model 1626 and 1627 differential pressure switches are identical in design and construction except that Model 1626 has a single electric switch and Model 1627 has dual electric switches. Model 1627 can therefore provide dual control when required. It can be set to open or close two independent electrical circuits, each preset for its own actuation pressure. Both units have diaphragm sealed motion take outs providing maximum protection against leakage. CAUTION: FOR USE ONLY WITH AIR OR COMPATIBLE GASES.
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DS Bourdon Tube Pressure Switch

DS Bourdon Tube Pressure Switch
Customers tell us that this is the best pressure switch made. The Mercoid D Series is one of the world's broadest lines of pressure switches. Whatever your application might be, it is most probable it can be fully satisfied with a D Series pressure switch. The D Series has extremely high sensitivity and great repeatability. The DA Models are equipped with two external adjustments, one for setting high pressure operating point, the other for setting low pressure operating point. Deadband, the difference between high and low set points, is adjustable over the full scale. The DS Models are equipped with a single external adjustment for setting operating point only. The deadband is fixed at a factory setting and cannot be altered in the field. For switches choose between the snap action switch, hermetically sealed snap action switch and hermetically sealed mercury switch.
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Averaging Velocity Sensor

Averaging Velocity Sensor
₹ 2,000 / Piece Get Latest Price
  • Type Velocity Sensor
  • Weight 28 g
  • Material Stainless Steel
  • Storage Temperature -40 to 140 degree F (-40 to 60 degree C)
  • Process Connection Outer diameter 10 mm
  • Operating Temperature 40 to 120 degree F (4 to 49 degree C)
  • Process Connection Inner diameter 6 mm
  • Color White
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H2 Dual-Action Explosion-proof Pressure Switch

H2 Dual-Action Explosion-proof Pressure Switch
Explosion-proof, UL & CSA Listed for Class I, Groups B, C & D and Class II, Groups E, F & G. The H2 is designed for sequencing two different actions as pressure of a liquid or gas increases or decreases. The design consists of two concentric pistons operated by a single diaphragm with one pressure chamber. Each piston actuates a separate switch independent of the other. The switches may be adjusted to operate together, at opposite ends of the range or at two intermediate set points. The threaded top is removed to field adjust or service switches without disturbing electrical or pressure connections. The Duotect switch is explosion-proof and weatherproof. It can be mounted in any position and is not affected by vibration.
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Series BYDS Bypass Damper Switch

Series BYDS Bypass Damper Switch
The Series BYDS Bypass Damper Switch is designed to control motorized bypass dampers. As individual zone dampers open and close, the system static pressure will rise and fall. In order to maintain proper airflow and static pressure through the HVAC system, a bypass system incorporating a floating type motorized damper and a static pressure control should be incorporated. A typical onoff pressure switch cannot operate in this application due to the high cycle rate that would result, eventually causing contact burnout. The BYDS static pressure control is equipped with a solid-state switching and timing circuit to enhance operation and improve long-term reliability in this demanding application. CONTROL OPERATIONThe BYDS Bypass Damper Switch is designed for use with a three wire floating point damper actuator used to control the static pressure on zone control systems requiring motorized bypass dampers. A bypass damper, bypasses air from the discharge air side of the HVAC unit back in the return air side. The air flow is modulated in order to maintain a constant static pressure in the system as individual zone dampers open and close. The static pressure control is equipped with solid-state switching which dramatically increases the life of the control. On an increase in static pressure the BYDS will send 24 volts out and start the actuator to drive open. When the static pressure reaches set-point the actuator will stop. After a ten second delay the actuator will start to drive the damper closed if there has not been an increase in static pressure. A green LED indicates when the damper is in the open position or being driven open. A 24 VAC transformer is required to power the BYDS control and damper actuator. The unit includes tubing and two static pressure probes.
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Series DSGT Digital Indicating Transmitter

Series DSGT Digital Indicating Transmitter
Series DSGT Digital Indicating Transmitter is a versatile multi-function process gage that features an excellent 0.25% full scale accuracy. This all-in-one digital gage package is designed to reduce installation costs, instrument cost, and save space where an application requires a gage, transmitter, and switches. The Series DSGT gage comes standards with a loop-powered 4-20 mA transmitter output and is offered with one or two optional SPDT switches. The Series DSGT gage is housed in a durable fiberglass reinforced thermoplastic case that is designed to meet NEMA 4 (IP65) requirements. The gage features a menu-driven display for easy customization. User selectable features include 12 engineering units of measure, password protected calibration and disable functions, as well as an adjustable bar graph and updatedampening rates.
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BDPA Adjustable Differential Pressure Alarm

BDPA Adjustable Differential Pressure Alarm
The Series BDPA Adjustable Differential Pressure Alarm with built-in audible and visual set point indication is designed for overpressure, vacuum, and differential pressure applications. The scaled adjustment knob allows changes to the switching pressure to be made without a pressure gage. The BDPA is available with settings from 0.08" w.c. (20 Pa) to 20" w.c. (5000 Pa). The silicone diaphragm and PA 6.6 body make the Series BDPA perfect for use with air and other noncombustible gases. The Series BDPA Adjustable Differential Pressure Alarms offer a versatile range of configurations allowing utilization of their many features. The BDPA can be powered by battery or 24 VDCVAC line power. If connecting line power, the battery can act as back-up power in case of power outage. When set point threshold is reached, a local loud audible buzzer and bright LED will indicate periodically notifying of set point activation. An SPDT contact may also be wired to send a signal remotely to a DDC or building management system. A snooze button located through an opening in the cover can be pressed by the user to manually disengage the audible and visual indication until a maintenance operation is performed. If the instrument is mounted where it is difficult to access, a remote contact may be connected allowing the user to deactivate the buzzer and LED at the remote contact location. The Series BDPA Differential Pressure Alarm's great functional versatility makes it perfect for filter, fan, and ventilation applications or any retrofit job where installing electrical wiring proves cost-prohibitive. Note: For a 12" npt connection, use the 12" conduit fitting adapter (A-483).
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RLD1 Refrigerant Leak Detector

RLD1 Refrigerant Leak Detector
Detect and pinpoint even small leaks of refrigerant gases using the Model RLD1 Refrigerant Leak Detector. The RLD1 is effective in detecting existing refrigerants including HFC, HCFC, CFC, SF6, R134a, and R123. Unit features thumbwheel operation to increase sensitivity and audio and visual indication. An increasing tick rate sounds as a leak is pinpointed and the red indication light flashes more rapidly. The flexible gooseneck probe is ideal for hard to reach areas. Use the model RLD1 for use in domestic and commercial refrigeration systems, automotive, air conditioning, and quality control testing environments.
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Model 485B Thermo-Hygrometer

Model 485B Thermo-Hygrometer
Model 485B Digital Thermo-Hygrometer is a versatile, compact, hand-held instrument for measuring percentage of relative humidity and temperature in F or C. Dew point and wet bulb temperature is derived from relative humidity and temperature measurements and displayed on the LCD. Hold key freezes the current temperature and relative humdity readings for situations where readings fluctuate. Store up to 99 readings with the nonvolatile memory function ideal for technicians needing to take multiple readings for later analysis.
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Series TAC3 Pocket Tachometer

Series TAC3 Pocket Tachometer
The Series TAC3 Pocket Tachometer measures and displays rotational speed of saw blades, grinders, engines, motors, and conveyor belts. The unique ergonomic design provides direct line-of-sight viewing of display and target. Easy-to-read 5-digit alphanumeric dual LCD also displays on-target, continuous measurement, laser and low batter indication. Measurements of up to 999, 999 can be viewed with the onscreen multiplier. The Model TAC3 is a 32 function tachometerratemeter, totalizercounter, and timer. It is programmable to read in English or Metric units. An input socket accepts remote sensing devices and an output socket allows for pulse output to external indicating devices. The Model TAC3 can be tripod mounted and Locked-On for accurate and continuous operation. This tachometer also stores minimum, maximum, and last measurement in memory. Model TAC3K Kit comes with tachometer, plastic case, remote contact assembly, concave and convex contact tips, 3.9 in. (10 cm) circumference contact wheel, NIST certification, and 5 ft (1.5 m) of reflective tape. Optional TAC3-91 Remote Optical Sensor allows this unit to measure rps, rpm, or rph in hard to reach locations.
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Series TIC Thermal Imaging Camera

Series TIC Thermal Imaging Camera
  • Applications Heat contrasts to prevent plant equipment failures., Detects air leaks in buildings
The Series TIC Thermal Imaging Camera allows users to see heat contrasts to prevent plant equipment failures, detect air leaks in buildings, and many more applications. Infrared radiation is given off by objects according to how warm they are, and the camera translates the measured levels into visual light on the bright 2.5" 160 x 120 resolution LCD. For increased differentiation among temperatures, the camera can automatically adjust the color band for a narrower range of temperatures throughout the 4 to 482F ( -20 to 250C) temperature range of the camera. Besides taking spot measurements, the camera can also be set for isothermal, area, or profile analysis. All cameras include a Li-Ion battery, battery charger, docking station, SD memory card, SD memory card reader, sun shield, lens cap, video cable, standard reporting software, and a calibration report. A Bluetooth earphone and USB cable are also included in TIC-30 units for making voice annotations and real time recording. Up to 9 movable temperature spots can be selected to get specific temperature measurements of objects on the display. On the TIC-20 and TIC-30, there are flash, visual light camera, and a laser pointer to help identify the objects in the picture better. The visual image can be blended with the thermal image for better illustration of where the hot or cold spots are in the image.
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Series CDX Wall Mount Carbon Dioxide Transmitter

Series CDX Wall Mount Carbon Dioxide Transmitter
  • Product Applications On Demand Ventilation
The Series CDX Carbon Dioxide Transmitter is a low cost and high performing CO2 sensor. This product will provide immediate energy savings by functioning in conjunction with building automation systems and allowing the user to effortlessly and effectively control fresh air into preferred areas. On-Demand ventilation using CO2 sensors prevents energy losses from over ventilation while maintaining indoor air quality. The potential for the greatest energy saving occurs in areas where occupancy alters over the duration of the day. The Series CDX Transmitters utilize the patented Automatic Background Calibration (ABC) Logic self-calibration system. ABC Logic virtually eliminates the need for manual calibration in applications where the indoor CO2 level drops to outside levels during unoccupied periods. If the transmitter is being used in an application where a building is continuously occupied 24 hours per day, then the user will permit that the ABC Logic feature be turned off.
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Model 1207A Handheld Flue Gas Combustion Analyzer

Model 1207A Handheld Flue Gas Combustion Analyzer
The Versatile Model 1207A Handheld Flue Gas Combustion Analyzer makes adjusting boilers for optimum efficiency quicker and easier. With the large LCD display, users can monitor four parameters simultaneously and change the parameters shown using the rotary dial selection switch. For extra protection, the analyzer comes standard with a protective boot and magnetic back. In order to track the measurements, the 1207A can store up to 255 time stamped test sets in memory and can output measurements to a serial printer. The 1207A comes preprogrammed for Natural Gas, Light Oil, Propane, Butane, LPG, and Wood Pellets. Along with analyzing combustion measurements, the analyzer can be used as a COCO2 indicator, pressure manometer, or thermocouple thermometer.
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A1F Low Cost OEM Pressure Switch

A1F Low Cost OEM Pressure Switch
Low cost and precision made, the A1F Pressure Switch is ideal for OEM industrial applications. Wetted materials of 316 SS and fluorocarbon ensure great chemical compatibility with a wide range of process media. The open case style is perfect for panel mounting applications like pump skids. Field installable weatherproof enclosure is available in polycarbonate offering a low cost weatherproof switch. Superior 15 A contact allows direct control of motors or pumps without the use of external relays, a true cost savings. Features include a convenient indicating scale for quick and easy field adjustment.
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1000W Weatherproof Diaphragm Operated Pressure Switch

1000W Weatherproof Diaphragm Operated Pressure Switch
Extremely rugged construction provides excellent reliability in chemical, petroleum and industrial plants. Bellville spring movement permits mounting of control in any position and helps prevent contact chatter. new design also provides high overpressure protection. Weatherproof housing is standard.
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RSM Room Status Monitor

RSM Room Status Monitor
  • Product Applications Hospital Isolation Wards, Pharmaceutical, Manufacturing, Cleanrooms, Animal Facilities
The Series RSM Room Status Monitor is designed for critical low differential pressure applications that require stringent pressure monitoring and alarming. The Series RSM can be configured to monitor positive or negative pressure in protected environments and hospital isolation rooms per CDC guidelines. The RSM is a complete system that includes a backlit RGB LCD display with a graphic user interface which enables access to pressure, security, calibration, and alarm setup. The touch-screen displays menus that guide the user through setup, as well as setting up password protection. Red and green LED's and a local audible alarm (with time delay feature) alert personnel to system status. The RSM has a NEMA 1 (IP20) rated fire retardant plastic for indoor applications. True differential pressure is displayed with a resolution of 0.001 in w.c. The very low pressure capacitance is dead ended and avoids the potential for cross contamination of the room and reference space as well as eliminating drift that results from fouling of flow based sensors, which by nature have a flow path connecting the protected and reference spaces. Additionally, there are two levels of password protection available as well as optional BACnet MSTP communication. A calibration certificate is provided with every unit.
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Series FDT Flush Diaphragm Transmitter

Series FDT Flush Diaphragm Transmitter
The Series FDT Flush Diaphragm Transmitter is designed for highly cyclical conditions. Flush sensor feature prevents any potential inaccuracies due to build-up or blockage which is a typical problem found in most non-flush transmitter sensors. Units have a non-oil filled sensor element that provides resistance to temperature fluctuations. Manufactured from a solid piece of steel, the sensing diaphragm can withstand the most abrasivecyclical applications. Series FDT transmitters perform well in high cyclical environments with the presence of water-hammering or spiking. Flush feature greatly reduces chance of leakage. Tough materials allow the unit to withstand harsh process conditions. Advanced manufacturing techniques, extreme environmental burn-in, and thorough residual stress relieving procedures ensure unit will maintain its high performance standard over time.
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