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Series AVFS Air Flow Switch

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 troubleshooting, 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.

Product Applications

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

Testimonial

” I would like to put on record my appreciation of the service you provide. Your prompt delivery/collection service is very useful as it minimizes equipment downtime. I have always found the work carried out to be of the highest quality. The calibration paperwork received is always clear and concise. In short it has made our compliance with quality standards easier. I would recommend your calibration service to anyone.”
“ PERFECT is the most suitable word to describe their service “

“I did the Right Choice ,cost effective,Great Service”

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