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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

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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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
View Full Spec Sheet

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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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