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Dwyer Air Flow Switch: SPST, 30V DC/250V AC, 3 A, 1,969 fpm Max - Airflow Switches
DwyerAirflow Switches

Dwyer Air Flow Switch: SPST, 30V DC/250V AC, 3 A, 1,969 fpm Max

The Dwyer AVFS-2 Air Flow Switch is a SPST device rated for 30V DC/250V AC at 3 A, with a maximum air velocity of 1,969 fpm and a minimum of 197 fpm in horizontal orientation. It features a PBT housing with a NEMA 4X…

SKU 3G-OTH-69294

Brand
Dwyer
Item
Air Flow Switch: SPST, 30V DC/250V AC, 3 A, 1,969 fpm Max
Category
Airflow Switches
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Technical Specifications

Dwyer
Manufacturer Part Number
AVFS-2
NEMA Rating
4X
Contact Form
SPST
Input Voltage
30V DC/250V AC
Housing Material
PBT
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Dwyer Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The Dwyer AVFS-2 Air Flow Switch is a SPST device rated for 30V DC/250V AC at 3 A, with a maximum air velocity of 1,969 fpm and a minimum of 197 fpm in horizontal orientation. It features a PBT housing with a NEMA 4X rating, making it suitable for industrial airflow monitoring applications.

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 AVFS-2 air flow switch used for?

The Dwyer AVFS-2 air flow switch monitors airflow in ducts or enclosures to prove fan operation or detect filter blockage. It is common in HVAC, ventilation, and industrial process systems where a reliable SPST switch at 30V DC/250V AC is needed.

What are the specifications of the Dwyer AVFS-2?

The Dwyer AVFS-2 is a SPST air flow switch rated for 30V DC/250V AC at 3 A. It detects airflow from 197 fpm (horizontal minimum) up to 1,969 fpm maximum. The housing is PBT with a NEMA 4X rating for corrosion resistance.

Where to buy the Dwyer AVFS-2 air flow switch worldwide?

3G Electric supplies the Dwyer AVFS-2 air flow switch to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on this SPST switch rated for 30V DC/250V AC.

How to install the Dwyer AVFS-2 air flow switch?

Mount the Dwyer AVFS-2 in a horizontal duct section with the paddle oriented into the airflow. Wire the SPST contacts for 30V DC or 250V AC at up to 3 A. Ensure the minimum airflow of 197 fpm is maintained for reliable switching.

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 airflow switches. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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