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Difference between ultrasonic level meter and radar level meter

Published Time:

2021-08-05

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　　The ultrasonic level meter is a digital level instrument controlled by a microprocessor. During measurement, ultrasonic pulses are emitted by a sensor (transducer). After the sound waves are reflected by the liquid surface, they are received by the same sensor or an ultrasonic receiver. The piezoelectric crystal or magnetostrictive device converts them into electrical signals, and the distance from the sensor to the surface of the liquid being measured is calculated based on the time between the emission and reception of the sound waves. Because it uses non-contact measurement, the measured medium is virtually unrestricted, and it can be widely used to measure the height of various liquid and solid materials.

　　The radar level meter is a general-purpose radar level meter. It is a measuring instrument based on the time-of-flight principle. Radar waves travel at the speed of light, and the travel time can be converted into a level signal by electronic components. The probe emits high-frequency pulses that propagate in space at the speed of light. When the pulses encounter the material surface, they are reflected back and received by the receiver in the instrument, and the distance signal is converted into a level signal.

　　1. The measuring range of a radar level meter is much larger than that of an ultrasonic level meter.

　　2. Radar level meters come in horn, rod, and cable types, allowing them to be used in more complex working conditions compared to ultrasonic level meters.

　　3. The accuracy of ultrasonic level meters is not as good as that of radar level meters.

　　4. Radar level meters are relatively more expensive.

　　5. When using a radar level meter, the dielectric constant of the medium must be considered.

　　6. Ultrasonic level meters cannot be used in vacuum, high steam content, or foamy liquid surface conditions.

Ineffective installation of radar level gauges may affect measurements

Precautions for using high-frequency radar level gauges

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