Greyline DFS 5.1 Doppler Flow Switch
The Greyline DFS 5.1 Doppler Flow Switch With Non-Contacting Sensor is ideal for pump protection or to activate flow/no-flow alarms. Recommended for "difficult liquids" including wastewater, cooling water, slurries, sludge, chemicals, viscous liquids, and abrasives.
The Greyline DFS 5.1 control relay can be set to turn ON and OFF at any flow rate between 0.075 m/s to 3 m/s (0.25 ft/s and 10 ft/s). Insert two links for separate ON/OFF set points or just one link for a Hi or Lo flow alarm. Set the relay actuation time delay from 0 to 80 seconds.
The clamp-on ultrasonic sensor mounts on the outside of metal or plastic pipes without cutting the pipe or shutting down flow. It works on any pipe diameter 12.5 mm (0.5 in) or larger and installs in minutes. There are no moving parts and no maintenance is required.
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