DFS-II Doppler Flow Switch

Please Note:
This model has been replaced by the new Greyline DFS 5.1 Doppler Flow Switch.
Service and tech support for the original DFS-II are available from Greyline. Parts will be available until June 2015.



DFS-II Brochure
DFS-II User's Guide
DFS-II Engineering Specifications
How Doppler Works
Dow Corning Coupling Compound MSDS
More Information
How To Order
DFS-II Order Form
Greyline Product List
What's New from Greyline

  • 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

DFS-II Doppler Flow Switch

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).

Doppler Flowmeter for Display and Control...

Combine flow control with a complete flow metering solution through the Greyline DFM 5.1 Doppler Flow Meter. It displays flow rate, totalizes and includes 2 fully programmable control relays.

Copyright 1997-2011 [Greyline Instruments Inc.] All rights reserved.
Information in this document is subject to change without notice.