Ultrasonic level gauge, definition of material level: the term "material level" refers to the surface position of liquid or solid materials in various equipment and open or closed containers. There are the following definitions for materials of different properties:
1. Liquid level refers to the height of liquid medium surface in equipment and container
2. Material level refers to the stacking height of block, particle or powder solid materials stored in equipment and containers
3. Boundary position refers to the position of the phase interface: two kinds of mutually insoluble liquids in the container form the composition interface due to their different gravity, which is the liquid-liquid interface; the interface between mutually insoluble liquids and solids in the container is the liquid-solid interface. The position of the liquid-liquid and liquid-solid interface is abbreviated as the boundary position.
Material level is the general term of liquid level, material level and boundary level. It is the instrument for measuring, indicating and controlling the material level, which is called material level detection instrument. Classification of level measuring instruments: due to the wide variety of objects to be measured and the different testing conditions and environments, there are various methods of level detection to meet the measurement requirements of different production processes. Level measuring instruments can be divided into two categories: continuous measurement and fixed-point measurement. Continuous measurement can continuously measure the change of level (continuous quantity, continuous output standard The fixed-point measuring method only detects whether the material level reaches the upper limit, lower limit or a specific position. The fixed-point measuring instrument is generally called the material level switch (point position, output switch signal) according to the working principle. The material level measuring instrument has direct reading type, static pressure type, buoyancy type, mechanical type, electrical type, etc