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Dwyer Air Velocity Transmitter: 4 mA to 20 mA, 32°F to 140°F, 641-6 - Air Velocity Transmitters
DwyerAir Velocity Transmitters

Dwyer Air Velocity Transmitter: 4 mA to 20 mA, 32°F to 140°F, 641-6

The DWYER Air Velocity Transmitter (model 641-6) is an air velocity transmitter that outputs a 4 mA to 20 mA signal. It measures air velocity from 250 fpm to 15,000 fpm within an operating temperature range of 32°F…

SKU 3G-OTH-167998

Brand
Dwyer
Item
Air Velocity Transmitter: 4 mA to 20 mA, 32°F to 140°F, 641-6
Category
Air Velocity Transmitters
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Technical Specifications

Dwyer
Manufacturer Part Number
641-6
Type
32°F to 140°F, 641-6, 250 fpm to 15,000 fpm
Air Velocity Accuracy
+/-3% (32 to 122 °F)
Calibration Certificate
Not Included
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Dwyer Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The DWYER Air Velocity Transmitter (model 641-6) is an air velocity transmitter that outputs a 4 mA to 20 mA signal. It measures air velocity from 250 fpm to 15,000 fpm within an operating temperature range of 32°F to 140°F, with an accuracy of +/-3% from 32 to 122 °F. This unit does not include a calibration certificate.

Frequently Asked Questions

What is the Dwyer 641-6 air velocity transmitter used for?

The Dwyer 641-6 air velocity transmitter is used in HVAC and industrial ventilation systems to measure and transmit air velocity from 250 fpm to 15,000 fpm. It outputs a 4 mA to 20 mA signal for monitoring and control applications such as duct balancing, fume hood monitoring, and cleanroom airflow verification.

What are the specifications of the Dwyer 641-6 air velocity transmitter?

The Dwyer 641-6 air velocity transmitter measures air velocity 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 outputs a 4 mA to 20 mA signal. The manufacturer part number is 641-6. A calibration certificate is not included.

Where to buy the Dwyer 641-6 air velocity transmitter worldwide?

You can source the Dwyer 641-6 air velocity transmitter through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time; we source and deliver this model to your location.

How to install the Dwyer 641-6 air velocity transmitter?

Install the Dwyer 641-6 air velocity transmitter in a straight duct section with minimal turbulence, following the manufacturer's mounting orientation. Connect the 4 mA to 20 mA output to your control system per the wiring diagram. Ensure the operating temperature stays within 32°F to 140°F for accurate readings.

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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