Flow meter for open channel

(irrigation channels, sewage networks)

A knowledge of the ultrasonic transit-time difference allows the measurement of the average speed of the fluid passing throught two probes (chords). These UF 322 CO flowmeters measure the velocity along several chords (two chords for the UF 322 CO-S and up to six chords for the UF 322 CO).

The average speed and a knowledge of the liquid level permits the accurate calculation of the flowrate and of the volume in the channel section. Speed measurements based on several chords permit a precise and bidirectional information even in case of dramatic changes of level (dry or storm conditions). The number of chords depends on the shape of the channel, on the upstream and downstream conditions, on the desired accuracy.

Advantages

* Integration on all the channel section

* Large rangeability of measurement

* Measurement made whether the work is completely full or not

* Measurement made no matter the shape of the channel and the downstream conditions

* Measurements of very slow speeds

* Insensibility to downstream obstruction

* Wide range of probes and supports

* Two 4-20 mA inputs for 2 external level sensors. The second level sensor provides additional reliability to the measurement (alarm if different)

* Diagnostic help : Echo display

* Possibility of installation in Ex area

Typical applications

* Sewage networks : rainwater/wastewater

* Inflow-discharge from sewage work

* Remote electronic surveillance of real-time measurements and of stored data

* Sampler monitoring

* Monitoring of the transfert to rainwater sewers and tanks

* Irrigation channels

* Rivers up to approx 10m width (beyond use the UF 322 RV)

*Note:the RS485 output can be offered instead of the RS232