Dwyer AVFS-1 Airflow Switch, SPST, 30V DC/250V AC, PBT Housing, NEMA 4X
The Dwyer AVFS-1 is an air flow switch with a single-pole, single-throw (SPST) contact form, rated for 30V DC/250V AC at 3 A. It features a PBT housing with a NEMA 4X rating and supports a maximum air velocity of…
SKU 3G-OTH-69285
Also listed as: AVFS1 · AVFS 1
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
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Product Description
The Dwyer AVFS-1 is an air flow switch with a single-pole, single-throw (SPST) contact form, rated for 30V DC/250V AC at 3 A. It features a PBT housing with a NEMA 4X rating and supports a maximum air velocity of 1,969 fpm, with a minimum of 197 fpm in horizontal orientation.
Frequently Asked Questions
What is the Dwyer AVFS-1 air flow switch used for?
The Dwyer AVFS-1 air flow switch detects airflow presence or loss in HVAC ducts, exhaust systems, and industrial ventilation. It activates or deactivates equipment like fans or alarms when air velocity falls below 197 fpm or exceeds 1,969 fpm, protecting processes and equipment.
What are the specifications of the Dwyer AVFS-1?
The Dwyer AVFS-1 is an SPST switch rated for 30V DC/250V AC at 3 A. It has a PBT housing with a NEMA 4X rating, suitable for washdown and corrosive environments. Minimum air velocity is 197 fpm horizontal; maximum is 1,969 fpm.
Where to buy the Dwyer AVFS-1 worldwide?
3G Electric supplies the Dwyer AVFS-1 air flow switch to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time; we source genuine Dwyer parts for global industrial applications.
How to install the Dwyer AVFS-1 air flow switch?
Mount the Dwyer AVFS-1 in a horizontal duct section with the paddle oriented into the airflow. Ensure the minimum air velocity of 197 fpm is met for reliable switching. Wire the SPST contacts per your control circuit voltage (30V DC or 250V AC max). Test operation before finalizing.
Used in
Common applications for DwyerDwyer Products
3G Electric supplies Dwyer airflow switches. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.
