Dwyer Instruments , provider of a range of practical and affordable instrumentation, is announcing the release of its new series AVFS air velocity flow switch.
These new series AVFS adjustable air velocity flow switches complement the Dwyer Instruments line of thermo-anemometer transmitters and handheld instruments and are specifically designed to monitor air flow in ducts, providing a 3A contact output to indicate a change or loss of flow.
The user simply turns on the fan or air handling unit and adjusts the set-point via the potentiometer to show normal status. They then alter a damper or decrease the fan speed to activate the AVFS air velocity flow switch. The flow switch will then signal a loss of flow and the N.O. SPST output will indicate the detected decrease.
For ease of installation and system trouble-shooting, the new series AVFS air velocity flow 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 series AVFS air velocity flow switch 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.
AVFS adjustable air velocity flow switches come in a compact, rugged PBT enclosure that is rated NEMA 4X (IP65), making them ideal for any ventilation system installation or similar BAS application.