Contrec - Open Channel Flow Computers for Accurate Level & Flow Measurement

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Open Channel Flow Computers for Accurate Level & Flow Measurement

Contrec’s open channel flow computers provide accurate and reliable measurement of liquid flow in open channels, flumes, and weirs. Designed for demanding industrial and environmental applications, these systems convert level sensor signals into precise flow rate calculations for improved process control and compliance.

Compatible with a wide range of level measurement technologies—including ultrasonic and pressure sensors—our open channel flow computers deliver real-time monitoring, flow totalisation, and advanced data logging. They are ideal for use in wastewater treatment, water management, environmental monitoring, and industrial discharge applications.

Built for durability and performance, Contrec systems ensure accurate flow measurement even in challenging conditions, helping operators optimise efficiency and maintain regulatory standards.

Key benefits include:

Precise open channel flow measurement using flumes and weirs
Integration with ultrasonic and analogue level sensors
Real-time flow rate calculation and totalisation
Reliable performance in wastewater and environmental applications
Easy integration with SCADA and control systems

Calculations

The volume calculation is based on the multiplication of the cross-sectional area and the velocity of the fluid in the channel.

Volume flow = velocity x area

The area for one of the selectable channel shapes is derived from the channel dimensions (width, base or diameter) and the input from the level sensor. For “non-linear” channels, parameters are available to allow the area to be read directly from the level input via a series of correction points.

For more information on Contrec Flow Computers, click here.