Dwyer Air Velocity Transmitter: 4 mA to 20 mA, 32°F to 140°F, 641-12
The DWYER Air Velocity Transmitter (model 641-12) 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-168000
Also listed as: 64112 · 641 12
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
Need installation or engineering help?
Ask a question
Product Description
The DWYER Air Velocity Transmitter (model 641-12) 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. The transmitter offers an air velocity accuracy of +/-3% over 32 to 122 °F. Note that a calibration certificate is not included with this unit.
Frequently Asked Questions
What is the Dwyer 641-12 air velocity transmitter used for?
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, making it suitable for ventilation monitoring and industrial air handling systems.
What are the specifications of the Dwyer 641-12 air velocity transmitter?
The Dwyer 641-12 measures air velocity from 250 fpm to 15,000 fpm with an accuracy of +/-3% over 32°F to 122°F. It operates from 32°F to 140°F and provides a 4 mA to 20 mA output. A calibration certificate is not included with this unit.
Where to buy the Dwyer 641-12 air velocity transmitter worldwide?
3G Electric supplies the Dwyer 641-12 air velocity transmitter worldwide. As a global industrial equipment distributor, we handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time for your region.
How to install the Dwyer 641-12 air velocity transmitter?
Mount the Dwyer 641-12 in a duct with the sensing element perpendicular to airflow. Connect the 4 mA to 20 mA output to a compatible controller or PLC. Ensure the operating temperature stays within 32°F to 140°F. For best accuracy, avoid turbulent flow near bends or dampers.
Used in
Common applications for DwyerDwyer 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.
