How to choose a radar level gauge?

In modern industrial level measurement, radar level gauges are widely used. As a mainstream instrument, radar level gauges have developed to this day, and more than 30 models have appeared to meet the needs of different working conditions. So it is very important to choose a correct instrument. So when selecting the instrument type, what do we base our judgment on? Our purpose is to obtain a reflected wave on the surface of the material to be tested; at the same time, there are no other interference waves or the interference waves are very small. There are two aspects that can have an impact on this purpose. One is: the way of electromagnetic wave transmission, the impact of the environment. Second: the influence of the state of the measured material surface on the reflected signal. Let’s break down the impact of these two aspects a little bit. Factors affecting the environment are: 1. The influence of obstacles. If the electromagnetic wave emitted by the instrument touches an obstacle, an interference waveform will be obtained. If other ideal installation locations cannot be selected, the problem can be solved by choosing an instrument with a small beam angle or using a waveguide or bypass pipe for installation. 2. Influence of the transmission medium (1) temperature (2) pressure (3) corrosiveness of the transmission medium (4) whether the transmission medium contains steam or dust, etc. (5) crystallization of volatile substances in the environment or adhesion of dust . If the above problems are solved, then we can guarantee that there is no large attenuation when the electromagnetic wave or ultrasonic wave reaches the surface of the material to be tested. An echo signal is obtained through the reflection of the measured material surface. The strength of the echo signal is related to the state below the measured material level. 1. The dielectric constant or hardness dielectric constant of the measured material affects the strength of electromagnetic wave reflection. The larger the dielectric constant, the stronger the reflected echo. Hardness refers to the reflection of sound waves. The greater the hardness, the stronger the reflection of sound waves. 2. The pile angle of the measured material surface 3. The stability of the measured material surface 4. The granularity and porosity of the measured object 5. The humidity of the measured object When the material surface is reflected, an identifiable echo signal can be obtained. With the end of the process of wave transmission, reflection and retransmission, the problems encountered during the process have been considered, and the selection of the instrument is completed.

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