What types of level measurement sensors are there?

RF Capacitance Level Limit Switch
The probe is mounted on the sidewall or top of the cartridge body, and the capacitor formed between the probe and the cartridge wall is used to detect whether the material height reaches the position of the sensor probe. The “level switch” is a general-purpose “level switch”. The solid and liquid materials can be tested and the field adaptability is strong. It is especially suitable for applications under high temperature, high pressure, strong corrosion, strong adhesion and strong impact. Medium purchase cost, long life and maintenance free.


Tuning fork level limit switch
The tuning fork type level limit switch relies on the piezoelectric crystal to drive the fork body to vibrate. When the fork body is submerged by the liquid, the frequency of the fork body oscillation decreases, and it is judged whether the liquid level reaches the position of the fork body. This principle is not affected by the electrical parameters of the measured medium and has high stability. It does not need to be adjusted after installation, maintenance-free, long life and high purchase cost. It is the first choice for liquid level limit detection and control in process control.


Conductivity level controller
The measuring electrode is connected to the measuring electrode by the conductive property of the liquid to be measured, and it is judged whether the liquid level reaches the measuring electrode position. The use of this principle is greatly restricted, and the liquid to be tested is required to have good electrical conductivity, but the purchase cost is low, and a large amount is used for automatic water supply and drainage, and a liquid having good conductivity such as beer and beverage.


Ultrasonic level gauge
It is believed that the height of the fill level or level is indirectly calculated by measuring the time that the sound wave is emitted from the surface of the transducer to the return. This principle is non-contact measurement, the principle is advanced, and it is used more stably in liquid measurement. In the solid material level measurement, it is susceptible to dust, steam, diffuse reflection of the material surface, etc., and the application is limited, and the purchase cost is high.


Heavy hammer level gauge
The hammer is pulled by the motor through the reducer and lowered from the top of the warehouse to the material surface. After the weight reaches the weight loss of the material surface, the distance of the weight drop is calculated to calculate the height of the material level. This principle is more suitable for the measurement of solid materials, and has strong adaptability on site, but the maintenance workload is large and the purchase cost is high.