Principle characteristics and installation of water immersion sensor

Principle characteristics and installation of water immersion sensor

Water flood sensors are used in many places, such as data centers, communication rooms, power stations, warehouses, archives and other places that need to be waterproof. So what exactly is a water sensor?

The water immersion sensor is based on the principle of liquid conduction, using electrodes to detect whether there is water, and then using the sensor to convert it into a dry contact output. When the detected liquid touches the photoelectric water immersion sensor probe at the bottom, the yellow and green wires are connected, that is, the normally open contact is closed, and the alarm can be automatically reset when the alarm is eliminated.

The water immersion sensor is divided into contact type water immersion detector and non-contact type water immersion detector. There are also big differences in their detection principles.

The contact type water immersion detector uses the principle of liquid conduction for detection. Normally, the two-stage probe is insulated by air. When the probe immersion height exceeds the limit, an alarm signal will be generated, but the immersion electrode will oxidize for a long time and cause the water leakage sensitivity to decrease; The non-contact water immersion detector uses the principle of light refraction and reflection in different medium cross-sections to detect. LEDs and photoelectric receivers are placed in the plastic hemisphere. When the detector is placed in the air, when it is close to the surface of the hemisphere, the Refraction, the LED photons received by the photoreceiver will be reduced, and the output will also change.

Characteristics of water immersion sensor:

Reasonable structure, high reliability, no adjustable parts, easy operation

Clearly and clearly indicate the system status, self-calibration, modular design, expand configuration capabilities Strong, easy to install, maintain and replace

Quick detection and real-time response to minimize the risk of leakage

High positioning accuracy, error not more than one thousandth

Wide monitoring range, adaptable Good performance and strong compatibility

We can choose the water immersion sensor according to different environments and different needs. Before using the water immersion sensor, we can check whether the circuit voltage power supply, etc. are correct to avoid unnecessary trouble .

The flood sensor is like an inspector, always guarding people's safety at work. Compared with the traditional manual patrol inspection, once the water immersion sensor senses the occurrence of water leakage, it can immediately send out an alarm to notify the staff to deal with it, so as to avoid major losses and hazards.

A RS-SJ-N01-2 king-shaped water immersion sensor uses alternating current to collect the inductance parameters of the stagnant water, which can accurately distinguish whether flooding occurs, and even pure water and tap water. The unique AC detection technology is adopted. Even if the electrode is soaked for a long time, it will not produce electrophoretic polarization. It does not rely on the electrode, which effectively avoids the problem of the water leakage sensitivity caused by the oxidation of the immersed electrode for a long time. It can be used in harsh environments such as humidity and high dust for a long time, with long use time and reliable detection.

System solution diagram

The equipment can choose 485 output or switch quantity dry contact output. The maximum communication distance of 485 output can reach 2000 meters, and it can be directly connected to the on-site PLC, industrial control instrument, configuration screen or configuration software. The maximum distance of the external leakage electrode can reach 30 meters, and the external leakage rope can be up to 30 meters.

How to install the water sensor?

The water immersion sensor has the following four installation methods:

1) Wall-mounted screw fixation: Place the water immersion sensor on the wall surface and install it, and the screw is directly tapped into the installation;

2) Bracket installation: Use the four gourd mounting holes (φ8) on both sides to fix it on the side of the bed;

3) Rail-type installation: install the oil leakage and water immersion sensor on the rail of the installation cabinet, and place the photosensitive part on the tested position. The sensor faces the direction where there may be water;

4) Cable type installation: Place the cable at the location to be measured.

Water immersion sensors are widely used in all walks of life, and their safety and reliability have brought great benefits to people and have been widely recognized. In the near future, with the further improvement of people's living standards, flood sensors will have a better application prospect.

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