DFS-II Doppler Flow Switch

• Non-Contacting Ultrasonic Sensor
• Easy Calibration
• Accurate and Repeatable
• 5 amp DPDT Control Relay
• Adjustable ON/OFF Set-Points
• Adjustable Time Delay
• Relay Status LED
• Intrinsic Safety Option

Control Flow from outside a pipe. Recommended for "difficult liquids" including wastewater, slurries, sludge, chemicals, viscous liquids and abrasives. The Greyline DFS-II is ideal for pump protection or to activate flow/no-flow alarms.

The non-intrusive DFS-II strap-on Sensor mounts on any pipe over 1/2" diameter without cutting the pipe or shutting down flow. It installs in minutes and requires no maintenance. Includes one 5 amp DPDT control relay with 0-60 second adjustable time delay. Bright LED indicators show relay status and signal strength. Electronics are housed in a watertight enclosure and Sensor cable is shielded and can be extended up to 500 ft. (152 m).