The water level controller refers to the mechanical or electronic method to control the high and low water level, and can control the solenoid valve, water pump, etc., to become the water level automatic controller or water level alarm, so as to achieve semi-automation or full automation.
Working method and principle
With water level switch
The water level switch is controlled by the water level controller, and there is an animation demonstration. The principle of the electronic water level switch is to detect the water level through an electronic probe, and then the water level detection special chip processes the detected signal. When the measured liquid reaches the action point, the chip outputs a high or low level signal, and then cooperates with the water level control To achieve liquid level control. No floating ball and dry reed tube, no external mechanical action, dirt-resistant and durable, not afraid of floating objects, installed at any angle, vertical installation has a certain anti-wave function, suitable for long-term immersion in water, working voltage is DC 5- 24V, very safe. Example: Put one water level switch in the high water level A position, and the other water level switch in the low water level B position. When the water reaches the B position, the relay is closed. At this time, the start of the water pump or the solenoid valve can be controlled to start water intake; when the water rises to the high water level A position, the relay is disconnected, and the pump or the solenoid valve is de-energized. Then the water reaches the low water level B position, and circulates continuously ...
Application of electronic water level switch in sewage
This method is more practical, stain-resistant, long-life and safe.
Electronic water level switch
Match with float switch
There are basically two ways: one is that the float switch carries a large metal ball. When immersed in water, the buoyancy is large, which can control two water levels. For example, when the water is full, the float rises due to the buoyancy and drives the ball valve. The valve is closed and the water flow is stopped. When there is less water, the float drops, the valve is opened, and the water is flowed again, and so on. This method is mostly used in boiling water boilers and toilet flushers. There is also a miniature float switch with a dry reed switch. The small reed switch with a magnetic outside closes the reed switch inside the rod to control the water level. Most of them are used to control the level of clean water. There is a deal, but it is susceptible to dirt and is not applicable to sewage. The second type is a cable float switch. The device is connected to the water pump through an elastic wire. It can be used for automatic control of water levels in water towers and pools and protection against water shortage. The length of the wire from a fixed point of the wire to the float determines the water level. This kind of water level switch is cheap, suitable for some occasions with less strict requirements, and has certain stain resistance. However, there is such a problem that the floating ball is easily affected by the foreign debris and its stability, especially when the fibrous debris is entangled with errors, it is not suitable to use multiple in the same small water tank, otherwise it will be entangled. The service life is relatively short, and most of them are directly connected to 220V, which has certain safety risks. One day, the electric wire will be leaked due to the broken wire. Therefore, cable type float switches generally have this warning: The power cord is an integral part of the device. Once the wire is damaged, the device should be replaced, and the wire is not allowed to be repaired.
Float switch
　　
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