AVFM-II Area-Velocity Flow Monitor


AVFM-II Brochure
AVFM-II Order Form
AVFM-II User's Guide
AVFM-II Engineering Specifications
Optional Pipe Mounting Bands
Optional Built-in Data Logger with PC Software
Sample Application
agoon Discharge Flow
How It Works
More Information
Greyline Product List
What's New from Greyline

Please Note:
This model has been replaced by the new Greyline AVFM 5.0 Area-Velocity Flow Meter. Parts, service and tech support for the AVFM-II are available from Greyline.


New! AVFM-II Area-Velocity Flow Meter

  • For Open Channels and Pipes

  • Ultrasonic - Measures Velocity + Level
    to Calculate Flow

  • No Flume or Weir required

  • 3 Isolated 4-20mA Outputs (Flow, Level and Velocity)

  • Totalizer and 2 Control Relays

  • Simple 3-key Calibration - Password Protected

  • Optional Intrinsically Safe Sensor

  • Optional built-in 50,000 point Data Logger and Software

AVFM-II Area-Velocity Flow Monitor

Monitor flow through open channels, partially full sewer pipes and surcharged pipes without a flume or weir. Ideal for stormwater, combined effluent, raw sewage, irrigation water and streams. 

The AVFM-II uses a submerged ultrasonic sensor to continuously measure both Velocity and Level in the channel. The sensor is a completely sealed ultrasonic unit with no orifices or ports. It mounts inside a pipe or at the bottom of a rectangular, trapezoid or egg-shaped channel. Calibration is simple: enter the pipe diameter or channel width and the AVFM-II computes the flow volume and displays the flow rate.

Submersible Ultrasonic Sensor
measures Level & Velocity

  Greyline Pipe Band Sensor Mounting for Area-Velocity Flowmeters

Do it the easy way - use a stainless steel pipe band for Area-Velocity Flow Meter sensor mounting. You can install the sensor and tie wrap the cable in place before you enter the manhole. Then insert the pipe band into the manhole inlet pipe and tighten the scissor-jack to expand the band for a friction fit inside the pipe.

Pipe Mounting Bands are available from Greyline in a range of sizes for common pipe diameters.

Portable data logging model...
Check out the portable, battery-powered Stingray Level-Velocity Logger for flow surveys and I&I studies. It runs for up to 4 years on a set of standard D-Cell Alkaline batteries.

Copyright 2006-2010 [Greyline Instruments Inc.] All rights reserved.
Information in this document is subject to change without notice.