Many locations require the use of water immersion sensors, which are widely used in data centers, communication rooms, power stations, warehouses, archives and other places that need to be waterproof. The function of the water immersion sensor is to detect whether there is water leakage in the monitored area. Once a water leak is found, an alarm is issued immediately to prevent the related loss and damage caused by the water leakage accident.
The common water immersion sensors on the market today are electrode (probe) type, photoelectric type and cable type, and are classified into contact type water immersion detectors and non-contact type immersion detectors. The following mainly describes the detection principle and the difference between the electrode type water sensor and the photoelectric water sensor.
Electrode-type water immersion sensor leak detection is based on the principle of liquid conductivity, is a contact type immersion detector, is generally separated from the main electrode design, with the need to use with the leakage controller. Use an electrode probe to detect the presence of water, and use the controller to convert the signal into a digital output signal to activate the alarm. The electrode type water immersion sensor is low in price, and is suitable for small-scale monitoring and places where water leakage prevention is not very high, such as warehouses, bathrooms, restaurants, etc.
Photoelectric water immersion sensors do not rely on liquid conductivity and are non-contact flood detectors. The principle of detection is to use the principle of refraction and reflection of light in different media sections. When the liquid touches the probe, the refractive index of the contact surface of the probe changes greatly. The change of the internal light of the probe is used to determine the leak condition and a leak alarm signal is issued. . The photoelectric water-immersed sensor probe and control terminal are integrated, eliminating the need for a controller. Fully sealed metal housing design, easy to install, not easily impact displacement, can adapt to more environments, life expectancy is several times the probe type, but due to high technical requirements, the production cost is relatively high. Applicable to communications base stations, precision machine rooms, warehouses, hotels, restaurants, libraries, and other places where water needs alarm.
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