The RQ-30 radar sensor measures the stage and the flow velocity and can be used to produce discharge records at stations where conventional methods cannot be used. Furthermore it allows to directly calculate the discharge in the sensor. Two techniques of contact free radar measurement are combined in one system.

 

The determination of the flow velocity is based on the principle of Doppler frequency shift. The water level is determined by transit time measurement. The measurement values are output via a serial interface or as analog current signals of 4 to 20mA. This allows a simple adoption into any measurement system. The system is installed simply without constructional changes of the channel itself. Existing bridges or buildings can be used to mount the system. The contact free radar technique guaranties a maintenance free operation over years.