What is the difference between an ultrasonic level gauge and a radar level gauge?

The ultrasonic wave used by the ultrasonic level gauge is used as the carrier, and the electromagnetic wave used by the radar. Electromagnetic waves will be absorbed by water, because water is a polar molecule, so ultrasonic level gauges can measure liquids very well, but radar level gauges cannot. So submarines use ultrasonic navigation, positioning and communication, that is, sonar. The radar level gauge is a measuring instrument based on the principle of time travel. The radar wave runs at the speed of light, and the running time can be converted into a level signal through electronic components. The probe emits a high-frequency pulse and propagates along the cable. When the pulse meets the material surface, it is reflected back and received by the receiver in the instrument, and the distance signal is converted into a level signal. All kinds of conductive, non-conductive media, corrosive media. The physical characteristics of electromagnetic waves are similar to those of visible light, and their propagation speed is equivalent to the speed of light. Such as coal bunkers, ash bins, oil tanks, acid tanks, etc.

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