Air Flow Switches

This category contains sensors with an electrical contact output at a specific air flow rate. Applications include low air flow condition duct alarm, fan monitoring, damper feedback, air handlers, and air flow proving in HVAC systems.

Model 530 Air Flow Switch

Adjustable from 400-1600 FPM, Stainless Steel Vane

The Model 530 air flow switch provides excellent sensitivity and reliability at a very reasonable price. Quality features include a rugged die cast body, stainless steel vane and SPDT snap switch. Unit is field adjustable from 400-1600 FPM. Mounting is fast and simple, with only two screws needed. Vane fits 6" or larger ducts.

Product Applications

Low air flow condition duct alarm.

Models & Ordering

Model	Description
530	Air flow switch.

Model AAFS Adjustable Air Flow Paddle Switch

Ranges from 200 to 1800 FPM, Stainless Steel Vane, ABS Housing

The MODEL AAFS Adjustable Air Flow Switch is capable of detecting a wide range of air velocities with minimal user calibration. Quality features include a stainless steel vane, galvanized steel base, and ABS enclosure.

Product Applications

Air flow proving in HVAC systems

Models & Ordering

Model	Description
AAFS	Adjustable air flow paddle switch

Series AVFS Air Flow Switch

Monitors Flow in Ducts with Contact Output and Local LED Indication

The SERIES AVFS Adjustable Air Flow Switch is specifically designed to monitor air flow in ducts and provides a 3 A contact output to indicate a change or loss of flow. The AVFS provides a ±5% set-point repeatability across a full scale range of 1-10 m/s (197-1969 fpm) and includes a mounting bracket for quick duct mounting.

Product Applications

Fan monitoring
Filter monitoring
Damper feedback
Air handlers

Models & Ordering

Model	Description
AVFS-1	Thermo air flow switch, 80-250 AC/DC.
AVFS-2	Thermo air flow switch, 24 VDC.