LIQUID LEVEL MEASURING DEVICE

The invention relates to liquid level indicators using parameters measurements of sound waves passing along the waveguide and reflected from the surface of the liquid. The detector contains the acoustical-electrical transducer in the case and the acoustic waveguide with reflectors immersed in the liquid. The acoustical-electrical transducer is executed membrane. The acoustic waveguide is executed in the form of the tube or separate tubes and is connected to the detector case by means of the sleeve coupling. Inside the sleeve coupling the acoustic matching unit is executed between the membrane of the acoustical-electrical transducer and the inlet (input hole) of the waveguide with the cavity connected with the cavity of the waveguide by means of the diaphragm with the channel. The case of the acoustical-electrical transducer is connected to the detector case through the damping element which serves as the acoustic decoupling between the acoustical-electrical transducer and the main case of the detector. In another version the end of the acoustic waveguide is connected to the intermediate waveguide executed in GAMMA -shaped or T-shaped form.