The ultrasonic level gauge is installed on the upper part of the container. Under the control of the electronic unit, the probe emits a beam of ultrasonic pulses towards the object being measured. The sound waves are reflected by the surface of the object, and some of the reflected echoes are received by the probe and converted into electrical signals. The time from ultrasonic emission to re reception is proportional to the distance between the probe and the object being measured. The electronic unit detects this time and calculates the measured distance based on the known sound speed. The level value can be obtained by subtraction.
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