General Oceanics - Model 2030R6C -Flowmeter, Mech Low Velocity W/One Way Clutch

Flowmeter, mech w/one way clutch fitted with a ball entrapment clutch that prevents the rotor from turning backwards. Response with the low velocity rotor-threshold approximately 6cm/sec (3/25 knot). Range 6cm/sec (3/25 knot) to 100cm/sec approximately (2 knots).