open channel flow meters for flumes and weirs

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OPEN CHANNEL FLOW METER : Principle of Operation | Display and Electronics | Specifications | Transducers

Flow by a Non Contact method

The common method of measuring flow through an open channel is to measure the height or HEAD of the liquid as it passes over an obstruction (a flume or weir) in the channel. Using ultrasonic level technology, Eesiflo open channel flow meters include a non-contacting sensor mounted above the flume or weir. By measuring the transit time or time of flight from transmission of an ultrasonic pulse to receipt of an echo, the water level or "Head" is accurately measured.

Flumes and weirs are specially designed channel shapes that characterize the flow of water. Common types are Rectangular Weirs, V-Notch Weirs, Parshall flumes and Palmer Bowlus flumes. The choice of flume or weir type depends on the application: flow rate, channel shape and solids content of the water. Contact Eesiflo for advice on selection of a suitable flume or weir for your application.

Eesiflo open channel flow meters can be calibrated to any flume or weir by menu selection. Calibration to uncommon or custom flumes are also possible. Eesiflo also offers a PC software program to set up and monitor measurements.

Eesiflo open channel flow meters include a non-contacting ultrasonic sensor, connecting cable and an electronics enclosure which can be mounted at a convenient location nearby (within 500 ft / 152 m). The instruments display, totalize, transmit and control. We can also package complete systems to your various needs.
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