How level sensors are used in vacuum drainage systems?

- Jan 04, 2020-

Vacuum drainage system is a new type of drainage system. It forms a vacuum condition in a closed drainage pipe network by a vacuum pump. Through the true space in each collection well, the pressure difference generated by vacuum negative pressure is used to realize the flow of sewage to the sewage tank, and finally discharged to the municipal sewage pipe network or sewage treatment equipment. Pressure flow drainage system. Compared with the traditional gravity drainage system, it has the advantages of environmental protection, water saving and power saving.

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In the past, a digital level sensor was installed in the water collecting pit for the drainage system of the integrated pipe gallery to monitor the liquid level change of the water collecting pit in real time. Turn on the drain pump when the liquid level is lower than the lower liquid level, and stop the drain pump when the liquid level reaches a high liquid level. With the development of sensor technology in recent years, the industrial-grade optical infrared level sensor / optical infrared level switch FS-IR1902D has been used in vacuum drainage systems. It has a simple structure, high positioning accuracy, no mechanical parts, no debugging, and high sensitivity. It has many advantages such as corrosion resistance, low power consumption, small size, etc. It also has the characteristics of high temperature resistance, high pressure resistance, strong corrosion resistance, stable chemical properties, and small influence on the measured medium. Below we tell you more about the detailed information of the optical infrared level sensor.Optical water level sensor theory

The optical infrared level switch is a contact point liquid level measurement and control device, which uses the principle of reflection and refraction at the interface between two different media. Single point detection, TTL compatible digital level signal output. This sensor is suitable for high power output occasions, and can directly drive incandescent lamp, audible alarm, relay or other. When the sensing end is immersed in liquid, infrared light will be transmitted from the conical surface, and the light intensity received by the photocell will become smaller, causing the output level to change. Diverse output circuits can meet different applications.


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The optical infrared level sensor is independent of other characteristics of the medium including temperature, pressure, density, and electrical parameters, so the liquid level detection is accurate, the repeatability is high, the response speed is fast, and the liquid level control is very accurate. All components inside the optical infrared level sensor have been resin-sealed. There are no mechanical moving parts inside the sensor, so the sensor has high reliability, long life, and maintenance-free. The sensor can also be debugging-free and calibration-free.