What are the water tank low liquid detection programs?

Low level detection in water tanks is an important measure to ensure the normal operation of the equipment and to avoid dry burning, and is widely used in a variety of equipment that needs to keep the water level stable. In order to realize this function, one of the common methods is to detect the change of liquid level in the tank through water level sensor, when the water level drops to a set low level, the equipment automatically stops working to avoid damage to the appliance.

Photoelectric water level sensors are a common method of level detection, which determines water level changes by emitting a light beam and detecting the light signal reflected from the water surface. When installing a photoelectric sensor, the probe of the sensor is usually placed in a suitable position in the tank, and changes in the water level will affect the reflection of the light signal. When the water level drops to a set minimum point, the sensor senses the change in reflected light and thus outputs the corresponding signal. At this point, the control system receives the signal of low water level, it will immediately stop the work of the equipment and trigger the external alarm system, such as LED indicator light or buzzer ringing, to remind the user of the water tank water shortage.

The advantage of photoelectric water level sensor is free of commissioning and calibration, very easy to install, and can be installed in different aspects of the tank (up, down, side or slant) according to the need. Because it has no mechanical moving parts, so it has a strong anti-interference ability, simple structure, small size, high precision, and corrosion resistance, high pressure resistance, can be in a harsh environment for a long time and stable work.

Float water level sensor is another common method of water level detection, its working principle is based on the principle of floating up and down with the water level changes. When the water level reaches a preset height, the float triggers a switch that sends out a signal. The method is simple and reliable, and is widely used in level detection in domestic and industrial water tanks. Although float-type water level sensors are also capable of realizing low level alarms, they are susceptible to interference from water flow, debris, and other factors during long-term use, and may require regular maintenance.

Capacitive water level sensors detect liquid level by measuring the change in capacitance caused by the change in water level in the tank. When the water level changes, the capacitance inside the tank also changes, and the sensor determines the change in water level by detecting the change in capacitance. However, capacitive sensors are easily affected by air temperature and humidity, the installation environment is also relatively high, to avoid metal.

In the tank low level detection, photoelectric water level sensor has become one of the most commonly used methods because of its simple structure, strong anti-interference ability and does not require frequent debugging. Through the reasonable selection of water level sensors, and combined with the application of the control system, accurate water level monitoring can be realized, and equipment operation can be stopped in time when the water level is too low to avoid equipment damage caused by dry burning. In addition, different types of water level sensors have their own advantages and disadvantages, users should choose the appropriate detection program according to the actual needs to ensure the safe and stable operation of the equipment.