PDFM 5.0 Portable Doppler Flow Meter

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This model has been replaced by the new Greyline PDFM 5.1 Portable Doppler Flow Meter.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


PDFM 5.0 Brochure
PDFM 5.0 User's Guide
PDFM 5.0 Engineering Specifications
How Doppler Works
Dow Corning Coupling Compound MSDS
Application Note
Flow Troubleshooting
Two Technologies
Doppler & Transit Time
Video - Sensor Mounting
in One Minute
More Information
How To Order
PDFM 5.0 Order Form
Greyline Product List
What's New from Greyline



  • Clamp-on Ultrasonic Transducer

  • Handheld Meter with large backlit LCD Display and Totalizer

  • Internal Battery and/or AC Powered

  • Built-in 5-Key Calibrator

  • 300,000 point Data Logger

  • USB Output and Windows software

  • 4-20mA Output

  • Rugged, watertight Carry Case


PDFM 5.0 Portable Doppler Flow Meter

It's ideal for flow troubleshooting, balancing and checking performance of permanent flow meters. The new PDFM 5.0 is fast and easy to operate – you can mount the sensor on the outside of a pipe in less than a minute. Use the built-in keypad and calibration menu to set up the flowmeter for your application. The PDFM 5.0 works on any liquid containing bubbles or solids and is recommended for "difficult liquids" like wastewater, slurries, sludge, chemicals, viscous liquids and abrasives. Measures flow through most metal and plastic pipes including PVC, ductile iron, carbon steel and stainless steel.

The Greyline PDFM 5.0 is AC/DC powered with built-in NiMH batteries and external charger. With its 4-20mA output you can use the PDFM 5.0 as a spare transmitter in critical applications. For flow studies and troubleshooting use the built-in 300,000 point Data Logger. Retrieve data logs with 'Greyline Logger' software – included free with each PDFM 5.0. Connect the USB output directly to your PC or Laptop to download data logger files.

The PDFM 5.0 includes a non-intrusive Doppler ultrasonic sensor for pipes from 1/2" to 180" (12.5 mm to 4.5 m) diameter, a stainless steel sensor mounting bracket and clamps, coupling compound and AC charger with a rugged IP67 carry case. It operates up to 18 hours from internal batteries and recharges overnight.

Start-up of a PDFM 5.0 Portable Doppler Flow Meter

It's easy to mount the clamp-on ultrasonic sensor and start-up the PDFM 5.0 to measure flow in pipes 1/2" diameter or larger.


For more permanent installations...

Consider the new Greyline DFM 5.1 Doppler Flow Meter with clamp-on ultrasonic sensor. The wall mount electronics enclosure includes a large backlit display, totalizer, control relays and isolated 4-20mA output.

Copyright 2009-2014 [Greyline Instruments Inc.] All rights reserved.
Information in this document is subject to change without notice.