Current Meters and Open Channel Meters

Current Meters and Open Channel Meters have been a speciality of Teledyne Valeport's since the company was first formed in 1969. The company started making instruments for measuring the speed of the water in London's River Thames, since then our product range has grown, but our expertise in current flow measurement remains.

Teledyne Valeport can offer a solution for any instrument you require, whether it's the traditional impeller mechanism or the high-accuracy electromagnetic type. Configurations are available for use in various applications, from hand-held measurements in the smallest streams through modelling experiments in the laboratory to self-contained instruments for navigable rivers, estuaries, ROVs and the deep ocean.

Our impeller instruments use the simple premise of measuring the speed of rotation of a helix in the water. PTFE bearings eliminate the need for specialised lubricants, and the magnetic contact closure minimises the moving parts in the system. This also allows the sensor to be remote from the measuring electronics (ideal for deep water applications).

The electromagnetic sensors use the Faraday Principle to measure the water speed. As a conductor (water) moves through an electromagnetic field (generated by the sensor), it generates a voltage measured by the sensor electrodes. Modern-day signal conditioning electronics and filtering techniques allow highly accurate measurements, and there is a choice of sensor shapes and sizes to suit the application. The solid-state sensors and standard titanium/polyurethane construction provide excellent corrosion resistance and depth ratings of up to 5000m.

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