In level measurement, due to the different materials measured, liquid level measurement, material level measurement and boundary level measurement also have different characteristics. These different level measurements in the actual working conditions of different performance, for the level measurement instrument has different requirements. Therefore, we for a variety of different level measurement properties must be carefully understood, so that in the level measurement instrumentation selection, so that the selected level measurement instrumentation and the application of working conditions match.

                                                                                                                                                                                               Sand materials

Material level measurement, liquid level measurement and boundary level measurement each have their own characteristics. Generally speaking, in practical applications, they have different characteristics are mainly expressed in the following aspects:

I. Characteristics of material level measurement

In the material level measurement, affected by the characteristics of the material, often with the following characteristics:

1. In and out of the material, the material will be friction or impact with the measuring element, but also hanging material in the measuring element.

2. In and out of the material, there will be stagnant areas in the silo, bridging and accumulation of material on the silo wall and other phenomena.

3. In the natural accumulation, the material surface will be a certain angle of repose, angle of repose with the size of the material particles, specific gravity, surface mobility and different, and by the feeding or discharge, the way of feeding, feeding (discharge) port location and so on have a great impact.

                                                                                                                                                                     Avoid installing level switches near inlets.

II, the characteristics of liquid level measurement

Different liquid properties, level measurement also has different characteristics:

1. Large storage tanks will appear in the storage tanks in various places of temperature, density is not uniform.

2. In the liquid level measurement, vacuum, high pressure, high temperature, or high temperature and pressure exist at the same time.

3. Level measurement, the measurement of a variety of corrosive media, with different corrosive.

4. In the process, the liquid level will have fluctuations, boiling, foam, containing suspended particles, containing bubbles, high viscosity and other different conditions.

III. Characteristics of boundary level measurement

In the liquid-liquid, liquid-solid phase interface position measurement, sometimes the interface will not be obvious, there is a turbid layer.

The above three different level measurement, due to different characteristics and performance, for the level measurement instrument also has different requirements, understand these different characteristics, help us better selection.