Dwyer AVFS-1 Series AVFS Air Flow Switch, 80-250 AC/DC

Dwyer, AVFS-1, Series AVFS Air Flow Switch, 80-250 AC/DC

Monitors Flow in Ducts with Contact Output and Local LED Indication

The new Series AVFS Adjustable Air Flow Switch complements the Dwyer Instruments line of thermo-anemometer transmitters and handheld instruments. The AVFS is specifically designed to monitor air flow in ducts and provides a 3A contact output to indicate a change or loss of flow. Simply turn on the fan or air handling unit and adjust the set-point via the potentiometer to show normal status. Then alter a damper or decrease fan speed to activate the AVFS. The AVFS will 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 Series AVFS possesses a red/green LED indication to provide local status if the air flow is above (green) or below (red) the set-point. 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. The AVFS Series Adjustable Air 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.

Features:

• Integral red/green air flow status LED’s
• Flush sensor design limits issues due to dust or particulate in the air flow
• IP65 construction

Product Applications

• Fan monitoring
• Filter monitoring
• Damper feedback
• Air handlers