How to use sensors to achieve water shortage protection? How about photoelectric liquid level sensors?

The photoelectric liquid level sensor uses the principle of light reflection and refraction at the interface of two different media, and is a new type of contact point liquid level measurement and control device. The photoelectric liquid level sensor has nothing to do with the corrosiveness, pressure, temperature, magnetism, density, electrical parameters, etc. of the liquid, so it has high reliability and very accurate liquid level control, which can reach ±1mm. On the other hand, in addition to being maintenance-free, the photoelectric liquid level sensor is also debugging-free and calibration-free, and can be directly installed and used, which is very convenient. It is suitable for home appliances, medical, water treatment and other industries, and its main function is to detect liquid levels. Now, the editor of Gongcai.com will take a look at how to apply photoelectric liquid level sensors to electrical equipment to achieve water shortage protection, waterless alarm and high liquid level reminder functions?

Photoelectric liquid level sensors can be divided into two types: integrated and separate. When using an integrated photoelectric liquid level sensor, the container that carries the liquid (such as a water tank) must be fixed in the appliance, while the separate liquid level sensor only needs to design a light cone on the water tank, and the water tank can be moved at will for cleaning, adding water, etc.

Photoelectric liquid level sensors can be divided into two types: single-point and multi-point. The photoelectric probe is relatively small in size, and multiple photoelectric probes can be installed on a measuring body to make a multi-point liquid level sensor. One photoelectric liquid level sensor can detect multiple liquid points.

The function of the photoelectric liquid level sensor is to detect the change of the liquid level at the location of the sensor. If you want to achieve the water shortage protection function, such as power failure due to water shortage, you need to install the sensor at the bottom of the container to continuously detect the change of the minimum liquid level. When there is no liquid in the container, the sensor will give a signal to cut off the power, and the equipment will stop working to prevent dry burning.

Installation Example

Practical application cases

It is worth noting that although the photoelectric liquid level sensor can be directly used to detect the lowest liquid level and cooperate with the controller system to complete the water shortage protection function, the use of the photoelectric liquid level sensor still needs to pay attention to the characteristics of the photoelectric liquid level sensor, such as small size, low power consumption, high accuracy, high repeatability, and the operation is not affected by factors such as pressure, temperature, and corrosion, so the application range is very wide. The photoelectric liquid level sensor adopts its optical principle, which is to judge the change of the liquid level based on the light emitted by the internal transmitting tube and the light received by the internal receiver. Therefore, the photoelectric liquid level sensor has the characteristics of stable performance.

On the other hand, the photoelectric liquid level sensor has the characteristics of free debugging, free calibration and free maintenance. It can be used directly by purchasing from the liquid level sensor manufacturer. The British SST photoelectric liquid level sensor/photoelectric liquid level switch-LLC200D3SH provided by Gongcai.com provides single-point liquid level detection and TTL-compatible push-pull output. The design sensor contains an infrared emitter and a detector, and the installation position is precise to ensure that the two achieve good optical coupling in the air. When the conical end of the sensor is immersed in the liquid, the infrared light will be transmitted through the conical surface, and the light intensity reaching the detector will become weak. The LLC series photoelectric liquid level sensor (industrial grade, photoelectric water immersion sensor) is designed for industrial applications. It can cope with heavy-load environments in industrial applications. This series of products is suitable for a wide voltage range power supply environment, and the drive current can reach 250mA. Therefore, this series of sensors can directly drive alarms and other equipment.

Therefore, to realize the water shortage protection function, it can be realized by directly installing and wiring the liquid level sensor and cooperating with the control system.