Answer / carl_ellis

Primary flow devices for open channel flow are devices like
a weir, flume, or venturi whose design includes a flow
restriction that produces a known level change at a known
flow rate.

The instrumentation is typically a top mounted, high
accuracy ultrasonic transmitter that measures level behind
the flow element by shooting an ultrasonic beam down at the
flow below it. The transmitter calculates flow based on
design information on the primary flow device.

Carl Ellis
Measure First

Answer / afsar mumtaz

ultrasonic flow instrument.ultrasonic transducer with
controller or compact type ultra sonic flow transmitter.
Siemens ech max 15/30 and so many models with mr100 like
controller.

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