The measurement and application of liquid level meter1

Level gauge measurement and application - — Liquid level meter in the liquid storage container or industrial production equipment, powder, granular solids or mutual miscibility between two liquids due to density surface formation interface position, according to the specific USES are divided into liquid level, material level, interface sensor and transmitter.

level measurement has an important position in the industrial automation system, is an important parameter of ensure the continuity and equipment safety. For example in the case of continuous production, to maintain certain devices ( Such as steam boiler, evaporator, etc. ) In the stability of liquid level height, to guarantee the safety of production and equipment is essential. Such as severe fluctuation of water level of large boiler, at once the water a few called bell, there may be danger of dry up. And as in the production of synthetic ammonia copper washing tower bottom liquid level control, such as liquid level is too high, refined with liquid gas, cause catalyst poisoning in synthetic tower; Instead, such as liquid level is too low, will lose the liquid seal, high pressure gas into regeneration system, cause serious accidents.

although liquid level measuring instrument selection and use is closely related with the production process, but general speaking, the purpose of the liquid level meter mainly has the following kinds:

( 1) Correctly measured the volume or the weight of container storage material, namely the purpose of level measurement is used for measurement and economic accounting.

　　( 2) Monitor container liquid level, the level allows the upper and lower limit alarm, which need not continuous testing and output level of specific values, as long as the switch signal output level changes.

　　( 3) Continuously monitor the production and adjustment, and liquid level to keep the height of the required, which requires continuous output level of the liquid level gauge instantaneous signal values.