How To Select TDR Guided Wave Radar Liquid Level Sensor in Thermal Power Plant

The selection of TDR radar level transmitter in thermal power plants is determined based on different measurement objects and working conditions. The guided wave radar level sensor has many advantages, such as low energy consumption, strong anti-interference, and is suitable for measuring volatile gases, foams, liquid fluctuations, wall-mounted and scale, bubbling or bubbling, ultra-low liquid levels, and dielectric constants. Or media with changing specific gravity. It can also measure the interface of two liquids with very different dielectric constants, such as oil and water, and is not affected by medium density, conductivity and temperature, and is suitable for measurements under high temperature and high pressure conditions.

In thermal power plants, Rod type guided wave radar level gauge is mainly used for liquid level measurement of high-pressure heaters, low-pressure heaters, condensers, deaerators and other equipment. When selecting a guided wave radar level sensor, you need to consider the characteristics of the measurement object and the working conditions. Different types of probes can be selected according to different needs.

The double-rod probe is suitable for applications with high viscosity and low suspended matter content, and can measure bulk liquids or solids. The advantage of TDR radar level transmitter is that it is not affected by the conductivity and temperature of the medium, and is suitable for media with a dielectric constant greater than 2.0. However, if there is material bridging or contamination between the probes, or if external objects interfere with the electromagnetic field, it may cause measurement abnormalities.

The coaxial rod probe is suitable for pure liquids with low viscosity and has high performance. The characteristic of the TDR radar level transmitter is that it can measure media with a dielectric constant as low as 1.4 and is resistant to high temperatures and high pressures. However, due to its closed electromagnetic field design, measurement errors may occur for applications with material accumulation and fouling, and it is therefore not suitable for medium level measurement in these situations.

The single-rod probe is a probe with a simple structure, suitable for working conditions with high viscosity, foam, suspended solids and scaling, and can measure liquids or bulk solids. The electromagnetic field design of the guided wave radar level sensor is more open and can ignore accumulation and contamination, but it is also more susceptible to the influence of approaching objects. The single-rod probe is suitable for media with a dielectric constant greater than 10.

Therefore, when selecting a TDR radar level transmitter in a thermal power plant, it is necessary to select the appropriate probe type based on the specific measurement objects and working conditions. No matter which probe is chosen, the characteristics of the medium and the working environment need to be considered comprehensively to ensure the accuracy and reliability of the measurement.