New  -  DFM 5.0 Doppler Flow Meter


This model has been replaced by the new Greyline DFM 5.1 Doppler Flow Meter.
Parts, service and tech support for the DFM 5.0 are available from Greyline.


DFM 5.0 Brochure
DFM 5.0 User's Guide
DFM 5.0 Engineering Specifications
App Note - Sand Slurry Flow Monitoring
App Note - Solution for Crude Oil Flow
How Doppler Works
Two Technologies -
Doppler & Transit Time
Dow Corning Coupling Compound MSDS
More Information
DFM 5.0 Order Form
Greyline Product List
What's New from Greyline
How To Order

  • Non-Contacting Ultrasonic Sensor

  • Large, Backlit LCD Display

  • 12-Digit Totalizer

  • Reverse Flow Measurement

  • Isolated 4-20mA (1000 ohm)

  • 2 Programmable Control Relays

  • Automatic Sensitivity Adjustment

  • Built-in 5-Key Calibrator

  • Optional 2 million point Data Logger
    with USB output to Flash memory

DFM 5.0 Doppler Flow Meter

Measure flow from outside a pipe. The Greyline DFM 5.0 is designed for "difficult liquids" that would damage regular flow meters - wastewater, slurries, sludge, chemicals, viscous liquids and abrasives. There is no obstruction to flow and no pressure drop. The non-intrusive, clamp-on ultrasonic sensor fits any pipe 1/2" (12.5 mm) Inside Diameter or larger. The electronics/display enclosure can be mounted nearby.

Use the isolated 4-20mA to transmit flow to remote displays, recorders or controllers. The programmable relays can be used for flow control, pump protection or flow proportionate pulse. Calibration is easy with the built-in 5-key calibrator. Display and totalize flow in your choice of engineering units (gallons, liters etc.)

Sensor cable can be extended up to 500 ft. (152 m) with no loss of signal. The standard sensor is rated non-incendive for Class I, Division 2 hazardous locations and the DFM 5.0 can be equipped with optional Intrinsic Safety Barriers for sensor installation in Class I, Division I hazardous locations. Other options include extra control relays and a built-in 2 million point Data Logger with USB output to Flash Drives.

The DFM 5.0 includes a new digital signal processor to filter background noise and interference, and to measure flow rates accurately in liquids containing gas bubbles or solids particles.


  Easy Calibration

The DFM 5.0 Doppler Flow Meter includes Greyline's user-friendly calibration system.

Use the built-in keypad to select pipe diameter and units of measurement. It's easy. You can calibrate the flowmeter in just a few minutes.

English, French and Spanish menus are available.

Flow troubleshooting and spot checks...

Consider the new handheld PDFM 5.0 Portable Doppler Flow Meter . It also works from outside the pipe with a clamp-on ultrasonic sensor, and includes a large digital display, totalizer and 4-20mA output.

Copyright 2008-2014 [Greyline Instruments Inc.] All rights reserved.
Information in this document is subject to change without notice.