The Greyline AVFM monitors flow through open channels, partially
full sewer pipes and surcharged pipes without a flume
or weir. The AVFM is ideal for municipal stormwater, combined effluent, raw
sewage and irrigation water.
The AVFM uses a submerged ultrasonic sensor
to continuously measure both velocity and level in the channel. The
sensor is resistant to fouling and corrosion. It is tolerant of turbulence
and high approach velocity. It can be configured with the
standard submerged velocity-level sensor, or with submerged velocity
plus a seperate non-contacting ultrasonic level sensor.