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Dwyer Air Velocity Transmitter: 4 mA to 20 mA, 32°F to 140°F, 641-24-LED, 250 fpm to 15,000 fpm - Air Velocity Transmitters
DwyerAir Velocity Transmitters

Dwyer Air Velocity Transmitter: 4 mA to 20 mA, 32°F to 140°F, 641-24-LED, 250 fpm to 15,000 fpm

The DWYER Air Velocity Transmitter (model 641-24-LED) is an air velocity transmitter with a 4 mA to 20 mA output, an LED display, and a measurement range of 250 fpm to 15,000 fpm. It operates within a temperature…

SKU 3G-OTH-168007

Also listed as: 64124LED · 641 24 LED

Brand
Dwyer
Item
Air Velocity Transmitter: 4 mA to 20 mA, 32°F to 140°F, 641-24-LED, 250 fpm to 15,000 fpm
Category
Air Velocity Transmitters
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

Dwyer
Manufacturer Part Number
641-24-LED
Type
32°F to 140°F, 641-24-LED, 250 fpm to 15,000 fpm, LED
Air Velocity Accuracy
+/-3% (32 to 122 °F)
Calibration Certificate
Not Included

Technical Documents

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Dwyer Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The DWYER Air Velocity Transmitter (model 641-24-LED) is an air velocity transmitter with a 4 mA to 20 mA output, an LED display, and a measurement range of 250 fpm to 15,000 fpm. It operates within a temperature range of 32°F to 140°F and offers an air velocity accuracy of +/-3% from 32 to 122 °F. This unit does not include a calibration certificate.

Frequently Asked Questions

What is the Dwyer 641-24-LED air velocity transmitter used for?

The Dwyer 641-24-LED air velocity transmitter measures airflow from 250 fpm to 15,000 fpm in HVAC ducts, cleanrooms, and industrial ventilation systems. It outputs a 4 mA to 20 mA signal for remote monitoring and includes an LED display for local readings.

What are the specifications of the Dwyer 641-24-LED?

The Dwyer 641-24-LED air velocity transmitter has a range of 250 fpm to 15,000 fpm, accuracy of +/-3% from 32°F to 122°F, and operates from 32°F to 140°F. It provides a 4 mA to 20 mA output and an LED display. No calibration certificate is included.

Where to buy the Dwyer 641-24-LED worldwide?

3G Electric supplies the Dwyer 641-24-LED air velocity transmitter to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on this model.

How to install the Dwyer 641-24-LED air velocity transmitter?

Mount the Dwyer 641-24-LED in a duct or plenum with the sensing element facing the airflow. Connect 24 VDC power and the 4 mA to 20 mA output to your controller. Ensure ambient temperature stays within 32°F to 140°F for reliable operation.

Used in

Common applications for Dwyer
Combustion air-filter monitoring — Magnehelic Series 2000 on burner air-intake filter banks
Clean-room and pharmaceutical pressurisation — Magnehelic / Capsuhelic differential-pressure gauges
HVAC fan-discharge static pressure — Mark II inclined-vertical manometers on AHU test points
Filter-blockage alarms — Photohelic Series 3000 combined gauge/switch on air-handling units
BMS-integrated pressure monitoring — Digihelic DH3 with 4–20 mA output for building management

Dwyer Products

3G Electric supplies Dwyer air velocity transmitters. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Compatible alternatives & equivalents

Cross-referenced by specification & description
Air velocity transmitter with 4 mA to 20 mA output and LED display. Measures 250 to 15,000 fpm with accuracy of +/-3% from 32 to 122 °F. Operating temperature range 32 to 140 °F. Suitable for HVAC duct, fume hood, and cleanroom airflow monitoring. Calibration certificate not included
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Air velocity transmitter with 4 mA to 20 mA output and LED display. Measures 250 to 15,000 fpm with accuracy of +/-3% from 32 to 122 °F. Operating temperature range 32 to 140 °F. Suitable for HVAC duct, fume hood, and cleanroom airflow monitoring. Calibration certificate not included
Air velocity transmitter with 4 mA to 20 mA output and LED display. Measures 250 fpm to 15,000 fpm with accuracy of ±3% from 32°F to 122°F. Operates in ambient temperatures from 32°F to 140°F. Used for monitoring airflow in HVAC ducts, fume hoods, and cleanrooms
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Air velocity transmitter with 4 mA to 20 mA output and LED display. Measures 250 fpm to 15,000 fpm with accuracy of ±3% from 32°F to 122°F. Operates in ambient temperatures from 32°F to 140°F. Used for monitoring airflow in HVAC ducts, fume hoods, and cleanrooms
The Dwyer 641-6 air velocity transmitter measures air velocity from 250 fpm to 15,000 fpm with an accuracy of ±3% over 32°F to 122°F. It operates in temperatures from 32°F to 140°F and provides a 4 mA to 20 mA output signal. This transmitter is used in HVAC and industrial ventilation systems for duct balancing, fume hood monitoring, and cleanroom airflow verification
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The Dwyer 641-6 air velocity transmitter measures air velocity from 250 fpm to 15,000 fpm with an accuracy of ±3% over 32°F to 122°F. It operates in temperatures from 32°F to 140°F and provides a 4 mA to 20 mA output signal. This transmitter is used in HVAC and industrial ventilation systems for duct balancing, fume hood monitoring, and cleanroom airflow verification
DWYER Air Velocity Transmitter: 4 mA to 20 mA, 32°F to 140°F, 641-18, 250 fpm to 15,000 fpm
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DWYER Air Velocity Transmitter: 4 mA to 20 mA, 32°F to 140°F, 641-18, 250 fpm to 15,000 fpm
The Dwyer AVU-2-A air velocity transmitter measures air velocity in HVAC ducts, fume hoods, and cleanrooms. It provides a 4-20 mA output signal for remote monitoring, with a measurement range up to 1575 fpm and an accuracy of ±5%. Operating temperature range is 32°F to 122°F. This unit has no display and does not include a calibration certificate
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The Dwyer AVU-2-A air velocity transmitter measures air velocity in HVAC ducts, fume hoods, and cleanrooms. It provides a 4-20 mA output signal for remote monitoring, with a measurement range up to 1575 fpm and an accuracy of ±5%. Operating temperature range is 32°F to 122°F. This unit has no display and does not include a calibration certificate
Air velocity transmitter with universal communication protocol, ±2% accuracy, and LCD display. Measures air velocity up to 400 fpm in a temperature range of 32°F to 122°F. Suitable for HVAC, cleanroom, and industrial ventilation applications. Calibration certificate not included
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Air velocity transmitter with universal communication protocol, ±2% accuracy, and LCD display. Measures air velocity up to 400 fpm in a temperature range of 32°F to 122°F. Suitable for HVAC, cleanroom, and industrial ventilation applications. Calibration certificate not included

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The Dwyer AVLV-2DA1 is an air velocity transmitter with a range of 400 fpm and accuracy of ±2%. It operates in temperatures from 32°F to 122°F and uses a Universal communication protocol. This unit has no display and is suited for measuring airflow in HVAC ducts, cleanrooms, and fume hoods where a local readout is not required
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The Dwyer AVLV-2DA1 is an air velocity transmitter with a range of 400 fpm and accuracy of ±2%. It operates in temperatures from 32°F to 122°F and uses a Universal communication protocol. This unit has no display and is suited for measuring airflow in HVAC ducts, cleanrooms, and fume hoods where a local readout is not required
This air velocity transmitter measures air flow from 250 fpm to 15,000 fpm with an accuracy of ±3% from 32°F to 122°F. It operates in temperatures from 32°F to 140°F and provides a 4 mA to 20 mA output signal. Typical applications include HVAC duct monitoring, fume hood face velocity measurement, and clean room air flow verification. Calibration certificate not included
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This air velocity transmitter measures air flow from 250 fpm to 15,000 fpm with an accuracy of ±3% from 32°F to 122°F. It operates in temperatures from 32°F to 140°F and provides a 4 mA to 20 mA output signal. Typical applications include HVAC duct monitoring, fume hood face velocity measurement, and clean room air flow verification. Calibration certificate not included
Air velocity transmitter with 4 mA to 20 mA output, measuring 250 to 15,000 fpm. Accuracy ±3% from 32 to 122 °F, operating range 32 to 140 °F. Features an LED display. Calibration certificate not included. Used in HVAC and industrial airflow monitoring
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Air velocity transmitter with 4 mA to 20 mA output, measuring 250 to 15,000 fpm. Accuracy ±3% from 32 to 122 °F, operating range 32 to 140 °F. Features an LED display. Calibration certificate not included. Used in HVAC and industrial airflow monitoring
Air velocity transmitter with 4-20 mA output, measuring air velocity up to 3150 fpm with ±5% accuracy. Operating temperature range 32°F to 122°F. No display or calibration certificate included. Suitable for HVAC duct monitoring, fume hood velocity measurement, and cleanroom airflow verification
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Air velocity transmitter with 4-20 mA output, measuring air velocity up to 3150 fpm with ±5% accuracy. Operating temperature range 32°F to 122°F. No display or calibration certificate included. Suitable for HVAC duct monitoring, fume hood velocity measurement, and cleanroom airflow verification
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The Dwyer 641-12 air velocity transmitter measures air flow in HVAC ducts, fume hoods, and cleanrooms. It outputs a 4 mA to 20 mA signal proportional to air velocity from 250 fpm to 15,000 fpm. Accuracy is +/-3% over 32°F to 122°F, with an operating temperature range of 32°F to 140°F. Calibration certificate not included
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The Dwyer 641-12 air velocity transmitter measures air flow in HVAC ducts, fume hoods, and cleanrooms. It outputs a 4 mA to 20 mA signal proportional to air velocity from 250 fpm to 15,000 fpm. Accuracy is +/-3% over 32°F to 122°F, with an operating temperature range of 32°F to 140°F. Calibration certificate not included
Air velocity transmitter with 4-20 mA output for monitoring airflow in HVAC ducts, fume hoods, and ventilation systems. Measures 250 to 15,000 fpm with ±3% accuracy from 32 to 122 °F. Operating temperature range 32 to 140 °F. Calibration certificate not included
Dwyer
Air velocity transmitter with 4-20 mA output for monitoring airflow in HVAC ducts, fume hoods, and ventilation systems. Measures 250 to 15,000 fpm with ±3% accuracy from 32 to 122 °F. Operating temperature range 32 to 140 °F. Calibration certificate not included
This air velocity transmitter measures air flow from 250 fpm to 15,000 fpm with an accuracy of +/-3% from 32°F to 122°F. It operates within a temperature range of 32°F to 140°F and provides a 4 mA to 20 mA output signal for monitoring and control in HVAC, ventilation, and industrial process systems. Calibration certificate not included
Dwyer
This air velocity transmitter measures air flow from 250 fpm to 15,000 fpm with an accuracy of +/-3% from 32°F to 122°F. It operates within a temperature range of 32°F to 140°F and provides a 4 mA to 20 mA output signal for monitoring and control in HVAC, ventilation, and industrial process systems. Calibration certificate not included