How to detect the liquid level of nutrient in soilless cultivation?

- Dec 20, 2019-

Soil was previously an essential factor for plant growth. Nowadays, plants can grow in a configured solution. We call this solution containing the elements required for plant growth to be a nutrient solution. There are many essential elements for plant growth. Among them, carbon, hydrogen, oxygen and other elements can be absorbed from the atmosphere, nitrogen, phosphorus, potassium, calcium, magnesium, sulfur and other large elements and iron, manganese, copper, boron, molybdenum and other trace elements. It needs to be configured. There are multiple nutrient solution formulas in the world, and people can choose from them according to their needs.

Automatic monitoring of the level of the nutrient solution is critical to the configuration, consumption, and addition of water to the dry nutrient solution. So how do you monitor the level of the nutrient solution? 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 nutrition liquid pool to monitor the level of the nutrition liquid level. The photoelectric liquid level sensor contains a near-infrared light emitting diode and a photosensitive receiver. The light from the light-emitting diode is directed into a lens on top of the sensor. When the liquid immerses the lens of the photoelectric level sensor, the light is refracted into the liquid, so that the receiver cannot receive or can only receive a small amount of light. The photoelectric level sensor senses this change, and the receiver can drive the internal electrical switch to turn on the water pump, which can remotely control the water pump to turn on functions such as supplemental nutrition liquid or high level alarm. If there is no liquid, the light from the LED is reflected directly from the lens back to the receiver.

Therefore, the photoelectric type liquid level sensor uses the principle of optical refraction to detect the liquid level, so it has less influence on the measured liquid and has a wide range of applications. It can be used to detect all kinds of liquids. EPTSensor photoelectric liquid level sensor / photoelectric liquid level switch-FS-IR1902D can detect the nutrition liquid level.

The liquid level sensor provides single-point liquid level detection and TTL signal output. The sensor contains an infrared emission source and a detector. When the cone end of the sensor is immersed in liquid, infrared light will be transmitted out of the cone surface, and the intensity of the light reaching the detector will become weak. On the other hand, FS-IR1902D is designed for industrial applications. Capable of heavy-duty environments in industrial applications. This series of products are suitable for a wide voltage range power supply environment, and the driving current can reach 250mA. Therefore, this series of sensors can directly drive alarms and other devices.


Photoelectric liquid level sensor / photoelectric liquid level switch FS-IR1902D characteristics:

1) M12 thread design

2) Housing of PSU anti-corrosive material.

2) Three-wire electrical interface

3) 250mA output

4) Available in normal and high temperature versions (high temperature up to 85 degrees Celsius)