Dwyer Series AVFS adjustable air flow switch

The Series AVFS adjustable air flow switch is specifically designed to monitor air flow in ducts and provides a 3A contact output to indicate a change or loss of flow. The AVFS will signal a loss of flow and the normally open SPST output will indicate the detected decrease. For ease of installation and system troubleshooting, the switch possesses a red/green LED indication to provide local status if the air flow is above (green) or below (red) the set point.

The switch also provides ±5% set-point repeatability across a full scale range of 1-10 m/s and includes a mounting bracket for quick duct mounting. The series’ adjustable air flow switches come in a compact, rugged PBT enclosure that is rated NEMA 4X (IP65), making them suitable for any ventilation system installation or similar BAS application.