Rotor Current Meter
A rotor current meter (RCM) is a mechanical current meter, an oceanography, oceanographic device deployed within an Mooring (oceanography), oceanographic mooring Flow meter, measuring the flow within the world oceans to learn more about ocean currents. Many RCMs have been replaced by instruments measuring the flow by hydroacoustics, the so-called Acoustic Doppler Current Profilers. However, for instance in Fram Strait, the Alfred Wegener Institute still uses RCMs for long-term monitoring the inflow into the Arctic Ocean. Measurement principle A RCM usually consists of the recording unit, a propeller to detect the water velocity and vane to determine the direction of the flow. The gimbal rings of the RCM-instruments allow to compensate a tilt of up to 40° of the mooring line. The recording unit houses a battery pack for energy supply, the Analog-to-digital converter, possible additional sensors for other variables (like the standard parameters conductivity, temperature, depth, C ...
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