“Photoelectric liquid level sensor is a new type of contact point liquid level measurement and control device developed by using the principle of reflection and refraction of light at the interface of two different media. It has many advantages such as simple structure, high positioning accuracy; no mechanical parts, no need to debug; high sensitivity and corrosion resistance; low power consumption; small size and many other advantages, which are gradually recognized by the market. The following Xiaobian from Gongcai.com will answer some common questions about photoelectric liquid level sensors for you?
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Photoelectric liquid level sensor is a new type of contact point liquid level measurement and control device developed by using the principle of reflection and refraction of light at the interface of two different media. It has many advantages such as simple structure, high positioning accuracy; no mechanical parts, no need to debug; high sensitivity and corrosion resistance; low power consumption; small size and many other advantages, which are gradually recognized by the market. The following Xiaobian from Gongcai.com will answer some common questions about photoelectric liquid level sensors for you?
Can photoelectric level sensors be used in corrosive environments?
Ordinary liquids are not corrosive, so the photoelectric liquid level sensor can use ordinary materials. If it is used in corrosive liquids such as diesel oil and gasoline, then the photoelectric liquid level sensor needs to use a PSU material probe. The unit price of the PSU material photoelectric liquid level sensor will be higher, but it can detect corrosive liquids. For example: a British SST strong corrosion-resistant photoelectric liquid level sensor/photoelectric liquid level switch provided by Gongcai.com – LLG810D3L24-003.
How is the waterproof performance of the photoelectric liquid level sensor?
The photoelectric liquid level sensor is generally installed as follows) We can see that only a part of the head is in contact with the liquid. Generally, the waterproof level does not need to be particularly high in this case. However, in some cases, the entire probe needs to be placed in the liquid for detection. In such cases, a photoelectric liquid level sensor with a higher waterproof level can be selected, such as IP68 waterproof level.
How to install the photoelectric liquid level sensor?
I won’t say much about the wiring part, let’s introduce the installation of the probe part.The installation of Nengdian Technology is very simple. There are mainly two types, which can be screwed in directly (with threads), and the other one can be screwed with holes.
How to solve this problem if used in liquid with fluctuating liquid level?
This problem can be solved by adding anti-shake logic to the program. If the liquid level has not been reached, but there is water vapor or water droplets, how to solve the problem of misjudgment? It can be calculated by using the factor of program bar. When there are water droplets, it will not affect the detection result and prevent misjudgment.
What are the functions of the photoelectric liquid level sensor?
The function of the photoelectric liquid level switch is to detect the liquid level. Compared with the float type liquid level switch, the capacitive liquid level switch, etc., the photoelectric liquid level switch is less affected by external factors, so it has higher reliability and longer life. The main function of the photoelectric liquid level switch is to detect the change of the liquid level, which can realize the functions of water shortage protection, low liquid level reminder and high liquid level alarm. E.g:
Water shortage protection function:
When the photoelectric liquid level switch detects that there is no water in the water tank, the liquid level switch will give a signal, and the equipment will stop working after receiving the signal, realizing the protection function of water shortage and power failure to prevent the machine from drying out. For example, the water level control of coffee machines, water purifiers, and steam microwave ovens uses liquid level switches to achieve water shortage protection.
Low liquid level reminder:
When the liquid level switch detects that the liquid reaches the set position at the bottom, the liquid level switch will give a signal prompt. After the equipment receives the signal, the control circuit realizes the alarm reminder function – light reminder, buzzer alarm, etc. Specific applications such as humidifiers, aromatherapy machines, etc.
High level detection:
When the photoelectric liquid level switch is installed at the bottom, the automatic water filling function can be realized. When it is detected that there is no water in the internal water tank, the liquid level switch sends a signal to drive the water pump to add water. To stop adding water, another liquid level switch needs to be installed at a high place to realize high liquid level detection. When the water level rises to the position of the photoelectric liquid level switch at a high place, the liquid level switch stops adding water after giving a signal to prevent overflow. Features.
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