How to detect the content of nutrient solution in soilless culture?

- May 10, 2020-

Soilless cultivation is loved by modern people for its high yield and high quality. Through the application of soilless cultivation technology, the space for planting can be saved to a large extent, and the agricultural products produced by the soilless cultivation technology are of high quality, which can provide people with greener and pollution-free agricultural products, which is to protect people's food safety. Of vital importance. Especially during the period of the new coronavirus, most people can only stay at home to ensure their safety. If there are soilless vegetables at home, they can basically meet the needs of life without going out. Let's take a look with you. How does the level sensor detect the content of nutrient solution in the water tank?

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In the equipment that needs to detect the liquid level, the liquid level sensor is indispensable. The main function of the liquid level sensor is to detect the liquid level. Therefore, a photoelectric liquid level sensor can be installed in the water tank of the nutrient liquid to monitor the nutrient liquid level. The photoelectric liquid level sensor includes a near-infrared light-emitting diode and a photosensitive receiver. The light from the light emitting diode is directed into the lens on top of the sensor. When the liquid is immersed in the lens of the photoelectric level sensor, the light is refracted into the liquid, so the receiver cannot receive or can only receive a small amount of light. The photoelectric liquid level sensor senses this change, the receiver can drive the internal electrical switch to turn on the water pump, and control the water pump to turn on to replenish the nutrient solution; when the nutrient solution reaches a high liquid level, the sensor gives an alarm to remind to stop adding liquid. If there is no liquid, the light from the LED will be reflected directly from the lens back to the receiver.

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The photoelectric liquid level sensor has less influence on the measured liquid, and has the characteristics of food grade and corrosion resistance. It can be used to detect various liquids. And because the head is smooth, cleaning is very convenient, Shenzhen EPT photoelectric level sensor / photoelectric level switch-FS-IR1901. The liquid level sensor provides single point liquid level detection and TTL compatible signal output. The design sensor contains an infrared emission source and a detector, and the installation position is accurate to ensure that the two achieve good optical coupling in the air. When the tapered end of the sensor is immersed in liquid, infrared light will be transmitted out of the tapered surface, and the intensity of light reaching the detector will be weakened. When the level of nutrient solution in the water tank is lower than the position of the sensor, the sensor can output a signal to prompt the user to add water in time to meet the needs of plant growth.