How to choose radar wave level gauge and ultrasonic level gauge

Ultrasonic liquid (material) level gauge and radar liquid (material) level gauge are two types of mainstream liquid level instruments commonly used, so which one should you choose when selecting the instrument? The purpose of the measurement is to obtain a reflected wave in the measured liquid (material surface); at the same time, there is no other interference wave or the interference wave is very small. There are two aspects that can influence this purpose. One is the influence of the environment in the way of electromagnetic wave or ultrasonic transmission. Second: the influence of the state of the liquid (material) surface to be measured on the reflected signal. Let’s break down these two impacts. The factors affecting the environment are: 1. The influence of obstacles. If the ultrasonic or electromagnetic wave emitted by the instrument touches the obstacle, an interference waveform will be obtained. If other ideal installation positions cannot be selected, the problem can be solved by choosing an instrument with a small beam angle or using a still-pipe or bypass tube. 2. Influence of transmission medium (1) Temperature (2) Pressure (3) Corrosion of transmission medium (4) Whether the transmission medium contains steam or dust, etc. (5) Crystallization of volatile substances in the environment or adhesion of dust . Solve the above problems, then we can ensure that there is no large attenuation when electromagnetic waves or ultrasonic waves reach the surface of the tested material. Through the reflection of the measured material surface, an echo signal is obtained. The strength of the echo signal is related to the state below the measured material surface. 1. The dielectric constant or hardness of the tested material affects the strength of electromagnetic wave reflection. The higher the dielectric constant, the stronger the reflected echo. The hardness is 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 liquid (material) surface 4. The particle size and porosity of the measured object A suitable instrument can obtain an identifiable echo signal when the measured liquid (material) surface reflects. With the end of the process of wave transmission, reflection and retransmission, all the problems encountered during the process are considered, and the selection of the instrument is completed.

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