Measure flow in part-filled pipes and open channels without weirs or flumes
Weirs and flumes frequently erode or silt up making readings misleading. And the Manning formula model is strongly affected by changes in the channel conditions and down-stream obstructions and can lead to dramatic over-reading.
Area velocity flow meters are the ideal solution for measuring flow in partially filled pipes and open channels.
How it works
- Level is measured by an ultrasonic sensor which can be mounted at the bottom of the channel, externally above the channel, or by a pressure sensor in the channel.
- Flow velocity is measured by a submerged Doppler sensor which is ideal for most surface water, waste water and effluent applications or alternatively by a non-contract laser sensor which is ideal for waste water and effluent.
- These measurements, combined with the stored data of the geometry of the channel give volumetric flow rate.