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

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Our Products

  1. Transmitter Device 40 Products available
  2. Measuring Instruments & Equipment 23 Products available
  3. Measurement Gauges & Fittings 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

Measuring Instruments & Equipment

Our Complete range of products are Dwyer Air Velocity Transmitter, 400 Air Velocity Meter, 460 Air Meter, Model 475-1-FM-AV Air Velocity Kit and Model MW-1 Pocket Wind Meter.

Dwyer Air Velocity Transmitter

Dwyer Air Velocity Transmitter
38,500 /Piece Get Latest Price
  • Brand Name Dwyer
  • Range 250 FPM (1.25 MPS) to 15000 FPM (75 MPS)
  • Display type LED display
  • Output range 4 to 20 mA
  • Display color Red
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400 Air Velocity Meter

400 Air Velocity Meter
Measure both pressure and air velocityRead the red figures directly in feet per minute of velocity - from 400 to 10, 000 fpm No conversion tables needed for air at standard conditions. Read the black figures in inches of water column air pressure - from 0 to 10" w.c. Our most popular precision air velocity instrument, the No. 400 is used to balance air conditioning systems, measure pressure drop across filters, and test fan and blower discharge and inlet pressures, as well as air velocity in ducts. It offers the convenience of a dual purpose instrument - plus high accuracy on easy-to-read scales. The Series 400 includes "leveling" adjustment and glass bubble level, which makes it a versatile, all around manometer for the air conditioning and balancing contractor or industrial plant. Kit includes No. 400 Air Meter and all accessories:Combination InclinedVertical Manometer. Dwyer Durablock precision machined solid acrylic plastic construction is virtually indestructible. Has both inclined section for high accuracy and vertical section for extended range. Pressure marked in black, Velocity in red figures. Easy to read - no reference tables needed. Has screw leveling adjustment and ground glass bubble level
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460 Air Meter

460 Air Meter
Simple and quick, the No. 460 Air Meter is popular for servicing air conditioning, heating and ventilating equipment. Direct reading velocity and static pressure scales - both low and high ranges - show supply and return grille velocities, furnace draft, pressure drop across filters, etc. The 460 gives consistent, accurate results with no tedious calibration. Rugged plastic for rough daily use. Dual velocity ranges read 260-1200 and 1000-4000 fpm; pressure ranges from .005-.09 and .05-1.0 inches w.c. Complete Kit includes air meter, return and supply grille probes, angle connector, cleaning materials, instruction card, air velocity calculator and carrying case.
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Model 475-1-FM-AV Air Velocity Kit

Model 475-1-FM-AV Air Velocity Kit
Convenient all-in-one kit is small, light and easy to use. No set-up or leveling needed. Digital manometer reads from 0-20.00" w.c. with 0.5% F.S. accuracy and minor divisions to 0.01. Large 12" LCD readout is easy to see in poorly lighted areas and has "low battery" warning. Included is a 6" stainless steel Pitot tube with integral compression fitting to hold it securely when taking readings. Also, two static pressure tips with magnetic mounting measure pressure drop across filters, condenser coils, etc. Kit comes complete with rubber tubing, 9V battery, step drill, AV calculator slide rule, and custom fitted carrying case. An indispensable test kit for the plant engineer, industrial hygienist and HVAC technician.
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Model MW-1 Pocket Wind Meter

Model MW-1 Pocket Wind Meter
Measure wind speed and temperature with the Model MW-1 Pocket Wind Meter. Easily view readings on the four digit 2" (51 mm) high LCD display with wind speed bar graph. Selectable air velocity ranges include ms, ftmin, kmh, mph, and knots. Ambient temperature recorded in F or C. The MW also features automatic shut-off, detailed instruction manual and protective plastic water resistant housing that floats. Accessories include a lanyard.
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Model 89088 Pocket Wind Meter

Model 89088 Pocket Wind Meter

The Model 89088 measures wind speed, temperature and wind chill accurately with its rotating vane and thermo-anemometer sensor. The body and rotating vane are constructed of light weight, sturdy ABS plastic. The ABS impeller spins on a high precision jewel bearing allowing for maximum performance. Wind speed, maximum wind speed, temperature and wind chill can quickly be viewed on the LCD display in user selectable measuring units of degrees F or C, ms, ftmin, Knots, MPH, Khr and Beauforts. The 89088 also features a data hold button and a 5 minute automatic shut-off to conserve battery life. Accessories include a supplied battery and a cloth carrying pouch.
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Model EMMA Digital Multifunction Environmental Meter

Model EMMA Digital Multifunction Environmental Meter
Monitoring the environmental conditions is more convenient with the Model EMMA multifunction meter. Humidity, temperature, air velocity, air flow, sound and light measurements are combined in one easy to use instrument. The large, dual-line 4-digit LCD display shows both the current and average reading. For reading measurements in dimly lit areas, the display has a built-in back light. Besides measuring the current and average reading, the Model EMMA allows the user to read the minimum, maximum and differential measurement for each of the parameters. Included with the meter is the carrying case, rubber boot, battery and tri-pod.
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Series MST-01 Digital Moisture Meter

Series MST-01 Digital Moisture Meter
The Series MST-01 Digital Moisture Meter is a high accuracy instrument used for determining the moisture content in wood, gypsum, bamboo, paper and other various materials. This unit features a durable and rugged enclosure which ensures a long life span. The large digital LCD makes measurements easy to read, while the hold function makes them easy to record. The MST-01 includes a nylon carrying case, protective cap, two replacement pins and one battery.
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Model MST2-01 Digital Moisture Meter

Model MST2-01 Digital Moisture Meter
The Model MST2-01 Digital Moisture Meter is a high-accuracy instrument used for determining the moisture content in wood, gypsum, bamboo, paper and other various materials. This unit also has the ability to measure ambient temperature and relative humidity. The large digital LCD makes measurements easy to read, while the hold function makes them easy to record. The MST2-01 includes a protective cap, two replacement pins, and one battery.
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Model AQH-20 Handheld Indoor Air Quality Meter

Model AQH-20 Handheld Indoor Air Quality Meter
The Model AQH-20 Indoor Air Quality Meter reduces the number of instruments a contractor has to carry by measuring the carbon dioxide concentration, air temperature, and humidity percentage in one device. A large backlit LCD display shows all three parameters simultaneously. The Model AQH-20 can display dew point or wet bulb temperatures in place of the ambient temperature. Minimum, maximum, and average readings are easily accessible through the function buttons. By pressing the hold key, the current values are held so that they can be recorded. An audible alarm warns the user that the current ambient conditions are becoming hazardous. The Model AQH-20 includes a hard carrying case and batteries.
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Model 450A-1 Digital Pocket Size Carbon Monoxide Meter

Model 450A-1 Digital Pocket Size Carbon Monoxide Meter
The Model 450A-1 Digital Pocket Size Carbon Monoxide Meter measures the ambient concentration of carbon monoxide (CO) in the environment and displays the measurement on the two line digital LCD screen. Besides the measurement, the maximum recorded CO value since the last reset is shown. An audible carbon monoxide alarm gives warning of CO levels above 25 ppm. For viewing in poorly lit environments, the built-in backlight brightens the display. Model 450A includes soft carrying case with belt loop, wrist strap, and batteries.
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Model SM-100 Digital Sound Meter

Model SM-100 Digital Sound Meter
Model SM-100 Digital Sound Meter is ideal for measuring noise levels from 30 to 130 dB with accuracy of 1.5 dB. Model SM-100 has a frequency of 31.5 Hz to 8 kHz, three different dB ranges, and a 12" condenser microphone. The SM-100 has two frequency weightings: the "A" weighting ranges from 30 to 130 dB, while the "C" weighting ranges from 35 to 130 dB. The four digit LCD backlit display has the ability to update in 0.5 seconds when the unit is set to fast response. Model SM-100 features data hold, ability to record maximumminimum, auto ranging, auto power-off, and a dynamic range of 50 dB. The compact size of the SM-100 makes it very easy to operate and store. Each unit includes battery, carrying case, black foam cover to protect the sensor, and instruction manual. The SM-100 is ideal for technicians measuring and recording sound levels in zones or rooms of buildings, musical halls, theaters and near equipment or machinery on the plant floor.
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CM-2 Digital Clamp Meter

CM-2 Digital Clamp Meter
Our compact, low cost Model CM-2 Digital Clamp Meter with True RMS is ideal for general electrical testing and troubleshooting. A few applications include HVAC, automotive, electricalpower, and environmental monitoring uses. The Model CM-2 measures DC and AC voltage to 600 V, DC and AC current to 400 A, and resistance to 40 M ohms. The digital clamp meter features datarange hold and auto range buttons to prevent the screen from updating when gathering values, as well as a zero function. The 3-34 digit LCD features automatic polarity, overload and low battery indication. The Model CM-2 is furnished with red and black test leads, batteries and a carrying case with belt loop
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Model CM-1 Digital Clamp Meter

Model CM-1 Digital Clamp Meter
The compact, low cost Model CM-1 Digital Clamp Meter is ideal for general electrical testing and troubleshooting. A few applications include HVAC, automotive, electricalpower, and environmental monitoring uses. The digital clamp meter measures DC and AC voltage to 600 V, AC current to 400 A, and resistance to 400 Ohms. In addition to volts, amps and ohms, this meter includes a frequency test to 400 Hz. The CM-1 also features datarange hold and auto range buttons to keep the screen from updating when gathering values. The 3-34 digit LCD features automatic polarity, overload and low battery indication. The Model CM-1 is furnished with red and black test leads, batteries and carrying case with belt loop.
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CM-3 Digital Clamp Meter

CM-3 Digital Clamp Meter
Our compact, low cost Model CM-3 Digital Clamp Meter is ideal for general electrical testing and troubleshooting. A few applications include HVAC, automotive, electricalpower, and environmental monitoring uses. The CM-3 measures DC and AC voltage to 600 V, AC current to 400 A, and resistance to 2000 Ohms. The digital clamp meter features datarange hold and auto range buttons to prevent the screen from updating when gathering values, as well as a zero function. Additional features include single and three phase energy measurement, MINMAX and average. The 3-34 digit backlit LCD features automatic polarity, overload, low battery indication and a bar graph. The Model CM-3 is furnished with red and black test leads, batteries and a carrying case with belt loop.
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PM-1 Digital Pen Meter

PM-1 Digital Pen Meter
Our compact, low cost Model PM-1 Digital Pen Meter is ideal for general electrical testing and troubleshooting. A few applications include HVAC, automotive, electricalpower, and environmental monitoring uses. This meter measures DC and AC voltage to 600 V and resistance to 40 M Ohms. In addition to volts and ohms, the digital pen meter includes continuity, diode, and frequency tests to 10 kHz. This meter features data hold, REL (relative value), and auto range buttons. The 4 digit LCD displays value, mode, and low battery indication. The Model PM-1 is furnished with red and black test leads, batteries and carrying case with belt clip.
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PM-2 Phase Rotation Digital Pen Meter

PM-2 Phase Rotation Digital Pen Meter
Our compact, low cost Model PM-2 Digital Pen Meter is ideal for general electrical testing and troubleshooting. A few applications include HVAC, automotive, electricalpower, and environmental monitoring uses. This meter measures DC and AC voltage to 600 V and resistance to 1499 Ohms. In addition to volts and ohms, this meter includes continuity, diode, and frequency tests to 69.9 Hz. Along with the mentioned functions, the PM-2 has the ability to perform a phase test from 100 to 600 V. This meter features data hold, display (to show voltage and frequency during AC tests), and clear screen buttons. The 4 digit LCD features value, mode, and low battery indication. The Model PM-2 is furnished with red and black test leads, batteries and carrying case with belt clip.
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Series AVU Air Velocity Transmitter

Series AVU Air Velocity Transmitter
  • Product Applications Supply and Exhaust Fan Tracking, Clean Room Systems, Medical Rooms
The Dwyer Series AVU Air Velocity Transmitter is ideal for a wide range of HVAC measurement and control applications, particularly in complete building control and energy management systems. The Series AVU offers 5% accuracy at a surprisingly low cost, with six units covering ranges from 0-785 fpm to 0-3150 fpm, with either 4-20 mA or 0-10 VDC output. The Series AVU Transmitter operates by measuring the heat loss from one of the two sensing elements in the air-stream, then calculating the air velocity. Units are virtually immune to drift due to the design of the sensing element, which makes the transmitter accurate over the whole air velocity range.
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Series VTT Hot-Wire Air Velocity Transmitter

Series VTT Hot-Wire Air Velocity Transmitter
The Series VTT Hot-Wire Air Velocity and Temperature Transmitter provides a versatile unit for air velocity and temperature needs. The VTT offers five field-selectable ranges as well as operating in metric (ms, C) or English (fpm, F) units. The VTT can measure up to 30 ms (6000 fpm) and 50C (122F). The units are available with or without an LCD display which alternates between velocity and temperature. Series VTT can be ordered in duct mount or remote mount configurations with 4-20 mA or 0-10 V outputs. The VTT is a useful transmitter for many common HVAC applications.
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Series 641 Air Velocity Transmitter

Series 641 Air Velocity Transmitter
  • Product Applications Exhaust Stack Flow Monitoring, HVAC Air Velocity Measurements, Clean Room Fresh Air Supply Etc.
The new Series 641 Air Velocity Transmitter is the ideal instrument for monitoring air flow. This transmitter uses a heated mass flow sensor which allows for precise velocity measurements at various flow rates and temperatures. The 641s 16 field selectable ranges provides it the versatility to be selected for several air flow applications. The optional LED produces a complete, low-cost solution for local indication of air flow.
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Series 641RM Air Velocity Transmitter with Cable

Series 641RM Air Velocity Transmitter With Cable
  • Product Applications Clean Room Fresh Air Supply, HVAC Air Velocity Measurements, Fan Supply and Exhaust Tracking, Ensure Porper Lab Hood Exhaust Flow Rates
The Series 641RM is the ideal instrument for monitoring air flow. This transmitter uses a heated mass flow sensor, which allows for precise velocity measurements at various flow rates and temperatures. The 641s 16 field selectable ranges from 0-250 to 15, 000 FPM (0-1.25 to 75 MPS) provide it the versatility to be selected for a multitude of applications. The units 6' cable which connects the sensing probe with the electronic enclosure allows the enclosure to be mounted where it can be more easily accessed. Longer cable lengths are available fro ducts that are at very high elevations from the plant floor. The optional LED produces a complete, compact solution for local indication of air flow.
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Model 641B Air Velocity Transmitter

Model 641B Air Velocity Transmitter
The Model 641B Air Velocity Transmitter uses a heated mass flow sensor technology. It has four user-selectable ranges from 250 FPM to 2000 FPM with four corresponding metric ranges of 1.25 MPS to 10 MPS. The 641 B provides an isolated 4-20 mA output proportional to the velocity. The Model 641B's steel sensor allows the unit to be used in dirty air environments. This rugged sensor is ideally suited for quick field cleaning from a simple cloth to a pulse of air from an air source. Proper sensor performance can be maintained in these polluted environments by easily removing dust and debris from the sensor which is problematic for Pitot tubes and other flow sensing transmitters.
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Digital Process Meter

Digital Process Meter
  • Unit accepts 4 to 20 mA, 0 to 5 VDC, or 0 to 10 VDC
Series DPMA Adjustable LCD Digital Panel Meter offers a 3-12 digit display for easy viewing in a standard 18 DIN package. Unit accepts 4 to 20 mA, 0 to 5 VDC, or 0 to 10 VDC inputs with a wide bipolar span and zero adjustment. Standard features include field selectable engineering units and decimal point positions. Choose from red, amber, or green segments for easy viewing at a distance. A 24 VDC power supply is required for the operation of the backlight.
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