Classification of liquid level sensors

In recent years, with the continuous development of electronic technology and automation, its high-tech has been widely used in various industries, and therefore, the Liquid Level Measurement and control technology has also been greatly improved.

In addition, because the functions of the liquid level sensor are becoming more and more perfect, it also provides a huge contribution to many industries, such as the liquid level of various media in petrochemical, metallurgy, electric power, pharmaceutical, water supply and drainage, environmental protection and other industries. Level Measurement is now inseparable from the monitoring of the liquid level. Since its development, the importance of liquid level sensors has become increasingly prominent, and even directly affects production and life.

Briefly, the liquid level sensor is a liquid level control device with a simple structure and convenient use. It is suitable for continuous detection of liquid level, material level or material level under special conditions such as high temperature, high pressure, strong corrosion, easy crystallization, anti-clogging, anti-cold junction and solid powder and granular materials, and can be widely used in various industries. In-process detection control.

The common liquid level sensors mainly include capacitive liquid level sensors, floating ball liquid level sensors, ultrasonic liquid level sensors, radar liquid level sensors and submersible liquid level sensors.

1 Capacitive Liquid Level Sensor

The capacitive liquid level sensor uses the capacitive detection principle, and the capacitive liquid level gauge measures the level of the liquid level by measuring the change of capacitance.

2 Float-type liquid level sensor

The float type liquid level sensor uses the magnetic float of the float level switch to rise or fall with the liquid level, so that the reed switch chip at the set position in the sensor detection tube acts, and sends out the contact opening (closing) conversion signal.

3 Ultrasonic Liquid Level Sensor

Ultrasonic liquid level sensor is a non-contact sensor that uses the principle of ultrasonic reflection, that is, the liquid level height is calculated by monitoring the time difference between ultrasonic transmission and reflection, so as to achieve the purpose of liquid level measurement.

4 Radar Liquid Level Sensor

The radar liquid level sensor has the same advantages as the laser measurement principle, and is not affected by the measurement medium, and is less affected by the external environment, and does not require repeated calibration, but the measurement height is generally within 6 meters, especially suitable for heating steam. In-tank measurement of large containers, such as residual oil, asphalt and other monitoring fields.

5 Hydrostatic Liquid Level Sensor

The measurement principle is that the static pressure generated by the liquid column is a function of the liquid density and liquid level. The Pressure Sensor installed at the bottom of the storage tank measures the gauge pressure relative to the atmospheric pressure, and converts the measured value into the liquid level according to the known medium density.

In addition, under the rapid development of the Internet of Things in recent years, the submersible liquid level sensor has a unique advantage in the liquid level sensor market due to the advantages of accurate measurement, high precision, fast response, advanced technology and low power consumption, and can adapt to With the development of the Internet of Things society, the sturdy stainless steel package makes it easy to measure the liquid level of most media, and occupies a leading position in the contact liquid level measurement.

Overall, the future prospects of liquid level sensors are very promising