Radar water level sensors for continuous, non-contact level measurement of liquids.
A series of extremely short microwavw pulses are irradiated by the sensor towards the surface of the water from wich they are reflected and then newly received by the receiving system. The signal return time is proportional to the distance between the sensor and the water surface. These models are more suitable than the submersible type, when the installation is made difficult due to strong current, possible overflows and edges of the unaccessible water basins.
