Specially designed to measure the fuel level in tanks of transport units. Tne measurement of the fuel level is provided by a probe that is immersing into the fuel tank. The probe is designed as a coaxial capacitor with a metallic tube (external electrode) and a central electrode (inner electrode). The sensor probe immersed in a fuel operates as a capasitor. Its capacity linearly depends on fuel level in the tank. Also includes electronic circuitry that provides the linear transformation of the capacity into digital pulses. To determine the fuel volume the procedure of the tank calibration should be done to set the correspondence between fuel volume and measured sensor capacity.