Combined Velocity Stage Radar (SDI-RADAR-300WL)

The Combined Velocity Stage Radar  (SDI-RADAR-300WL) flow meter uses radar technology to provide precise contactless measurement of surface flow velocity and precise distance (level) measurement from the sensor to the water surface. All contactless radar technology enables quick and simple sensor installation above the water surface, and requires minimum maintenance. Surface velocity measurement functionality is achieved by transmitting an electromagnetic wave in 24 GHz frequency range (K-band), and measuring the frequency shift of the electromagnetic wave reflected from the flowing water surface. The frequency shift is caused by the Doppler effect of the moving surface on the electromagnetic wave. As the relative speed between the radar sensor and the water surface increases, the detected frequency shift also increases, thus enabling the flow meter to precisely determine the surface velocity. Radar level measurement is achieved by transmitting modulated radar wave in 77 to 81 GHz frequency range (W-band) and observing returns. Due to the modulation and detection process in the sensor very precise measurements can be achieved and sensor is not dependent on the air temperature, humidity or other parameters of the environment.