What factors should be paid attention to when selecting ultrasonic liquid level meter

Sulfuric acid, hydrochloric acid, nitric acid and other corrosive liquids are common in chemical enterprises. When measuring liquid level, it is not a direct contact type liquid level meter. Ultrasonic liquid level meter is one of the most commonly used liquid level meters.

Ultrasonic liquid level gauge is non-contact measurement, suitable for most of the measurement media, ultrasonic liquid level gauge as a new type of liquid level measurement instrument, in the industrial process measurement has a very wide range of applications, with reliable work, easy installation, long service cycle, maintenance-free characteristics, and has a relative price advantage.Because the ultrasonic liquid level meter is not in contact with the measured medium when measuring the object level, and it is a fully sealed anti-corrosion structure, it has a good effect on measuring the liquid level of viscous, corrosive, turbid and other liquids.This paper makes some analysis on the matters needing attention in measuring the level of corrosive medium with ultrasonic liquid level meter.

Select ultrasonic liquid level meter is the first consideration of medium temperature, ultrasonic level meter under normal temperature, temperature around the probe to between 20 ~ 80 ℃, high temperature type temperature around the probe to in - 20 ~ 100 ℃.

The second is the choice of sensors, ultrasonic liquid level meter in the measurement of corrosive media, the general manufacturers will choose anticorrosive type of probe, in view of environmental factors, this occasion to choose the physical seal type of anticorrosive probe.

Finally, it is the choice of the host part, as the host part, requires good sealing, as long as there is a little medium leakage, it is possible to enter the ultrasonic liquid level meter from the shell or the inlet, resulting in internal circuit board corrosion.For corrosive gases in the environment can choose split type ultrasonic level meter, in order to protect the service life of the host.

Ultrasonic liquid level meter in the transmission of ultrasonic pulse, not at the same time to detect the reflection and echo.Because the transmitted ultrasonic pulse has a certain time width, and at the same time, after the ultrasonic wave is transmitted, the sensor still has residual vibration, during which the reflection and echo cannot be detected. Therefore, a short distance from the probe surface downward cannot be detected normally, which is called the blind area.If the zui high object level being measured enters the blind area, the instrument will not be detected correctly and errors will occur.If necessary, the object level meter can be raised and installed.In the engineering design selection, zui should pay attention to the problem of choosing a good installation location, design the appropriate installation interface.The installation position should be at a position with smooth liquid level and smooth material surface as far as possible. At the same time, it should be far away from escalator, inlet and outlet, as far as possible from container wall and agitator.

Link:Tenco