Optical Level Sensor in Stainless Steel Housing

The FFAR sensor can detect liquids easily, wear-free and continuous without requiring an electrical connection or a mechanical movement between fluid and sensor. The measuring principle is based on the total reflectance of infrared light at the interior of a translucent cone. Depending on whether the sensor tip is surrounded by liquid or air, the limit angle for the total reflectance of the light changes. If the sensor tip is surrounded by liquid, the light beam is diverted into the fluid and the sensor exit changes its switching status.

Thanks to the sensor head made of borosilicate glass and the stainless steel case, the sensor is extremely resistant to a great number of aggressive substances. The liquid to be measured can be conductive, non-conducting, cloudy or clear. All parts exposed to surrounding media withstand a compression load of up to 40 bar and a temperature of up to 65°C.