Advantages and limitations of radar level gauges

Abstract: In the long-term technological development, radar level gauges are widely used due to their stable performance, less maintenance and high measurement accuracy. However, radar level gauges also show their own limitations in long-term use. Below we analyze the advantages and limitations of radar level gauges. The advantages of the radar level gauge are mainly analyzed from the perspective of its working principle. The radar level gauge transmits very short microwave pulses with very low energy through the antenna system to transmit and receive, and the microprocessor processes the signals to identify the echoes generated by the micro pulses on the surface of the material. It is suitable for non-contact continuous measurement of the level of liquids, slurries and granular materials. Advantages and features: 1: The value can be measured accurately, with high precision compared to ultrasonic level gauges, many applicable working conditions, and a large range. 2: It has a good inhibition function. 3: It can also save all resources safely. 4: No maintenance is required, and the operability is very strong. 5: It is also very convenient to maintain, and the operation process is also very simple. 6: The scope of use is very wide. The limitations of radar level gauges are mainly reflected in the following aspects: 1. Mainly reflected in the influence of dielectric constant on radar. Although radar has minimal attenuation in a vacuum, it is affected in air. Especially when the air contains high dielectric dust powder (graphite, ferroalloy, etc.), and the water vapor is very large, it will cause a certain degree of attenuation to the radar and affect the measurement effect. 2. Most economical pulsed microwave level gauges use microwave frequencies of 5.8GHz or 6.3GHz, and their radiation angle is large (about 30°), which is easy to generate interference echoes on the container wall or internal components. Although increasing the size of the horn antenna can slightly reduce the emission angle, the volume increases and it is inconvenient to use; 3. When the liquid level fluctuates and foams, the situation becomes more complicated, and the signal scatters out of the propagation path or absorbs most of the energy, thereby 4. When there are obstacles such as agitators and pipes in the storage tank, these obstacles will also reflect electromagnetic wave signals, thereby generating false liquid level signals .

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