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Dwyer 641RM-12 Air Velocity Transmitter, 250-15000 fpm, 4-20 mA Output - Air Velocity Transmitters
DwyerAir Velocity Transmitters

Dwyer 641RM-12 Air Velocity Transmitter, 250-15000 fpm, 4-20 mA Output

The DWYER Air Velocity Transmitter (model 641RM-12) is an air velocity transmitter with a 4 mA to 20 mA output, measuring from 250 fpm to 15,000 fpm. It operates within a temperature range of 32°F to 140°F and offers…

SKU 3G-OTH-168002

Also listed as: 641RM12 · 641RM 12

Brand
Dwyer
Item
641RM-12 Air Velocity Transmitter, 250-15000 fpm, 4-20 mA Output
Part Number
641RM-12
Category
Air Velocity Transmitters
Available to Order
Also known as:641RM-12Dwyer
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Technical specs
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Local availability & support — the Philippines

Delivery
5–8 business days door-to-door; Bureau of Customs clearance typically 2–4 business days.
Payment
Invoicing in PHP or USD. Bank transfer and corporate PO accepted.
Ships to
Manila, Quezon City, Cebu, Davao, Batangas

Technical Specifications

Dwyer
Manufacturer Part Number
641RM-12
Type
32°F to 140°F, 641RM-12, 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 641RM-12) is an air velocity transmitter with a 4 mA to 20 mA output, measuring from 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 product does not include a calibration certificate.

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

Frequently Asked Questions

What is the DWYER 641RM-12 air velocity transmitter used for?

The DWYER 641RM-12 air velocity transmitter measures air flow from 250 fpm to 15,000 fpm in HVAC, ventilation, and industrial process systems. It outputs a 4 mA to 20 mA signal for monitoring and control applications.

What are the specifications of the DWYER 641RM-12?

The DWYER 641RM-12 has an air velocity 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 does not include a calibration certificate.

Where to buy the DWYER 641RM-12 worldwide?

3G Electric supplies the DWYER 641RM-12 air velocity transmitter worldwide. As a global industrial equipment distributor, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time.

How to install the DWYER 641RM-12 air velocity transmitter?

Install the DWYER 641RM-12 in a straight duct section per manufacturer guidelines, ensuring proper orientation for accurate flow measurement. Connect the 4 mA to 20 mA output to your control system. Verify wiring and seal the mounting point to prevent leaks.

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
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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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Air velocity transmitter with 4 mA to 20 mA output, measuring 1,000 fpm to 4,000 fpm with ±3% accuracy. Features an LCD display and BACnet communication protocol. Maximum operating temperature 122°F. Suitable for HVAC, cleanroom, and industrial ventilation airflow monitoring
Dwyer
Air velocity transmitter with 4 mA to 20 mA output, measuring 1,000 fpm to 4,000 fpm with ±3% accuracy. Features an LCD display and BACnet communication protocol. Maximum operating temperature 122°F. Suitable for HVAC, cleanroom, and industrial ventilation airflow monitoring

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