It is contactless and will measure the fl uid level in any type of tank except metal tank. It compatible for use with: petrol, diesel fuel, drinking water, black and gray waste water. After installation, the sensor can be calibrated very easily the aid of a led and a calibration wire; no other equipment is required. The sensor may be installed any type of tank except metal tanks but with a maximum depth of 120 cm. The Bus version sensor may be connected to Vetus ultrasonic graphic display (18.66.146). Analogue versiyon can be used with traditional analogue gauges.