Device and method for measuring the fluid level in a tank, e.g. a vehicle fuel tank, uses a hollow travelling wave conductor for detecting the interfaces between different layers within the tank

摘要

Device comprises a signal conductor (14) that links the top of the tank to the bottom. A voltage source creates a travelling wave and emits it into the signal conductor. A receiver detects a change in phase or intensity change caused by an interface between different media (20, 22, 24) within the tank. An analysis unit (30) is used to determine the fluid heights from the phase or intensity of the reflected waves. An Independent claim is made for a method of determining the fluid level in a reservoir tank.