Which water level sensor is suitable for the metal water tank?

- Nov 22, 2019-

Photoelectric water level detector sensor is more suitable for use on metal containers, This type level sensor adopts the principle of optical reflection. When the light emitted by the internal launch tube is in the waterless state, the light will be directly reflected back to the receiver; when there is water, the light will be Refraction is in the water, only a small amount or no light reflected back to the receiver.


The use of a photoelectric water level detector sensor is very simple, that is, the sensor is installed at the position to be detected, after powering up, the level sensor works. The photoelectric water level detector sensor can be mounted upwards, downwards, or on the side or on the slope. It can be installed in multiple directions, and the installation process is very simple. The sensor can be screwed along the thread or fixed with two locking screws. There is a problem to be paid attention to regarding the installation. It is necessary to open a hole in the water tank if you use optical level sensor.


More than photoelectric water level sensors, the tank also need to be opened a hole if you use float water level sensors and electrode type water level sensors. Non-contact capacitive water level sensors cannot be used on metal containers. Ultrasonic water level sensors have the requirement for container sizes. It is required that the water tank is too small to be used, and the ultrasonic water level sensor is more than ten times the price of other liquid level sensors. From the cost and application, the ultrasonic water level sensor is not the best choice.


If your tank cannot be opened, you can use the magnetic holder to fix the sensor, the drawing of level sensor installation with magnetic holder is as following:

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Why is the photoelectric water level detector sensor suitable for use on metal water tanks? Because the photoelectric water level detector sensor uses the optical principle, temperature, pressure, magnetic force, corrosivity, liquid color, density, water tank container material, wall thickness and other factors will not affect its work. The corrosiveness, viscosity, and small debris of the liquid will affect the operation of the float-type water level sensor, the float level liquid level detection accuracy is low, because of scale, the float will not be able to move and the reliability will be low. Capacitive water level sensors are limited by factors such as container material, wall thickness, liquid temperature, etc., and reliability and accuracy are far less than photoelectric water level sensors. The electrode type water level detector sensor produces electrolytes that are harmful to the human body and pollutes the water quality, while the photoelectric water level sensor complies with food hygiene standards (the head material needs to be replaced with food grade materials).


The photoelectric water level detector sensor is a non-mechanical product, and the internal components are sealed by the photosensitive resin potting, which not only realizes the waterproof function, but also has no moving parts inside and has high reliability. The photoelectric water level sensor has many advantages such as simple structure, high positioning accuracy, no debugging and corrosion resistance, low power consumption, small volume and the like. The photoelectric water level detector sensor can also be made into a multi-point water level sensor. A water level sensor can detect multiple liquid level points. The scope of application will be broader.