Photoelectric level sensor works:

The liquid level detection sensor contains a near-infrared light-emitting diode and a photosensitive receiver. The light emitted from the inside of the LED will enter the lens on top of the sensor. If the sensor is not in contact with the liquid, the light from the diode is reflected directly from the lens back to the receiver. When the height of the liquid is higher than the lens of the photoelectric liquid level sensor, the light will be refracted into the liquid, so that the receiver cannot receive or can only receive a small amount of light. The sensor will receive an inductive signal and the receiver can drive an internal electrical switch to activate an external alarm or control circuit.

Photoelectric level sensor function:

The photoelectric sensor is installed at the bottom of the device (or any other location as long as it can achieve this function). When the water level in the device is lower than the sensor, the sensor will give a signal to indicate the lack of water, so the device stops working and will automatically enter Water filling state; installed on the side, when the water is added to a certain position, the photoelectric liquid level sensor will also give a signal, so the device stops the water filling work to prevent the water from overflowing.

1. When the sensor detects that the device is dry or below 20%, it will give a signal alarm.

2. When the water of your equipment rises to a certain position, it will give a signal alarm prompt

3. When it is detected that there is no water in the container or less than 20%, a signal is given and the device automatically adds water.

Compared with photoelectric type and float type sensor:

1. The photoelectric type liquid level sensor is of small volume, and the installation process is simple and convenient, while the float switch has a large volume, a loose structure, a large installation space and a complicated installation process. The float type liquid level switch is driven by the buoyancy of the liquid to move the float with the magnet up and down, so as to control the opening or closing of the reed switch inside the float, so that the internal reed switch can be turned on and off. As a result, the minimum liquid level will be limited, and the photoelectric liquid level sensor will not have such a limitation.

2. Our sensors can be installed on the top, bottom, side, and obliquely (as long as it can meet your testing requirements), while the existing float level switch can only be installed on the top and bottom.

3. The photoelectric liquid level sensor has high precision of liquid level control, within ± 0.5mm, while the accuracy of the existing float-type liquid level switch is ± 3.0mm or even higher.

4. There is no internal friction phenomenon. The mechanical moving parts have high reliability, and the float-type liquid level switch float on the market is very easy to jam and cause bad, and produce dirt.

5. Photoelectric head smoothness is not easy to produce dirt, easy to clean.

6. Photoelectric built-in emission diode and phototransistor, so long life.

7. The live parts are completely isolated from the controlled liquid without any hidden dangers.

Photoelectric advantages:

The photoelectric type liquid level sensor has no mechanical parts and a simple internal structure, so the detection level is high and the life is long. Our sensors do not need to be debugged. They will have certain advantages in terms of sensitivity, corrosion resistance, high temperature resistance, low power consumption, and volume. Its chemical properties are stable and have little effect on the measured medium. The sensor's liquid level detection is accurate, the repeatability is high, and the response speed is fast. All the components inside the photoelectric type have been resin-sealed to achieve a waterproof effect.

Classification of photoelectric sensors:

The photoelectric liquid level sensor can be divided into two types: integrated type and separated type, and according to the number of liquid level points that can be detected, it can be divided into single point type and multipoint type.