Radar level meter selection range instructions

The radar level meter mainly detects the material level and liquid level by transmitting and receiving electromagnetic waves. The reasonable selection of the radar level meter can achieve better measurement. Among the many parameters of the selection, the range is very important. One of the parameters of the radar level gauge, the following is an introduction to the range selection of the radar level gauge and the precautions: 1. Introduction to the range of the radar level gauge The range of the radar level gauge generally refers to the ranging range, which is often expressed in terms of The two indicators of dead zone and range are indicated. For material level detection, the radar level meter should be selected as much as possible with a smaller blind area. This is because the existence of the blind area may cause material leakage or other accidents, so the stability and safety of continuous production cannot be guaranteed. Production safety hazards. The range of the radar level meter represents the maximum measurable range of the instrument under ideal standard operating conditions. However, in field use, the maximum actual measurable range of the radar level gauge may be lower than the nominal range index, which should be determined according to the specific working conditions. In the industrial production process, the height of most silos is 10-20m, and the height of silos is less than 50-70m. When selecting the range of the radar level gauge, it cannot be simply considered that selecting the same range as the bin height or a slight margin can meet the requirements. This is because limited by the working conditions, the calibration range and the actual range are not One-to-one correspondence. For example, the 30m range radar level gauge cannot detect the liquid level of the 10m deep pump pool with large fluctuations in the water surface, and the 70m range radar cannot detect the finished cement silo with a silo height of only 20m. These situations are more common in practical applications. 2. Precautions for the selection of the range of the radar level meter At present, the principles applied to the non-contact radar level meter products on the market mainly include pulse type and frequency-modulated continuous wave type. Whether the range selection of the radar level meter is appropriate is directly related to the material. Whether the detection of the level is reliable or not is related to whether the change of the material level in the silo can be detected in the whole range. At present, the range indicators given by most radar manufacturers usually represent the maximum distance that this type of instrument can detect under ideal conditions. Due to the influence of factors such as complex shape, large dust, low dielectric constant of materials, and input interference, the actual measurable distance of the radar instrument may be lower than the nominal range index, which the user must pay attention to in the selection and use. In view of the above situation, the selection of radar level measurement range must leave enough margin to ensure the stability and reliability of level detection. The specific selection principle of the range can be distinguished according to the different measurement objects and application conditions. Generally speaking, when measuring the liquid level of high dielectric constant materials with a calm liquid level, the range of the radar level gauge can be a little margin; when measuring the liquid level of materials with large liquid level fluctuations or low dielectric constants , the range of the radar level meter should be reserved for 1 times the margin or more; when measuring the level of solid materials with high dielectric constant, uniform particle size, moderate particle size, good material fluidity and flat surface , the range of the radar level gauge should reserve 1 times the margin; when measuring the level of solid materials under normal working conditions, the range of the radar level gauge should reserve 2 times the margin; when measuring powder materials or low Dielectric constant solid materials such as various silos in the cement industry are seriously affected by unfavorable factors such as large dust, complex material shapes and weak echoes, which have always been a worldwide problem in the field of material level detection. In the selection of radar level measurement range, the product with the largest range available should be selected as far as possible. This ensures that even very weak echoes can be effectively measured in extremely unfavorable measurement environments, and ensures high reliability of level measurement. Related product links: 922.html
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