How to understand the wide range of liquid level switches?

The liquid level switch is easy to install, reliable in operation and widely used. The liquid level switch, as the name suggests, is used to control the level switch, for us, *familiar app in the application of the automatic washing machine.
We only need to insert the washing machine is well known, fire hydrant.
How does the washing machine know how much water to add and how much water it has, it only depends on the level switch, the control valve, which allows the water level to reach the correct position to achieve a good cleaning effect.
The liquid level switch is a wide variety, considering various factors, it is commonly used in the washing machine pressure type water level switch, it is placed in the upper part of the washing tank, it has a low end of the bottom of the tracheal cylinder, and the filled air tube is closed inside. , and you won't come to form a pressure slightly higher than the outside world.
The level switch water level, the higher the pressure, it can indirectly measure the pressure of the water level. And measuring the level switch pressure still uses the elastic element, which is actuated by the deformation of the element. The method of measuring the liquid level of the liquid level switch is called “static pressure method” and is used by many people in the industry. But the more frequent and more direct method is "floating", I believe you have seen fishing, the float of the fishing line, the float floats on the surface of the water, when the fish bites the bait, it will float in defeat, we can stay at this time. But the industry uses a large float, which is actually a bat. The rise of the rising water is a well-known common sense, and the industrial level switch is used to measure the water level in the water tower. Because the water tower is several stories high, if you climb up to observe the user, you have added so much trouble. As long as the rope floats on the pulley and floats heavily outside the water and water tower, you can find the scale value on the ground to know the water tower. This is a very simple and straightforward approach.
It is also easy for the level switch to form a level switch by the float displacement contact switch, such as a subtle small switch (this is called a “microswitch”), which places the device at the height of a container at the float of the toilet tank. .
When floating at a height, the float pressure signal switch?
Of course, this is possible, and there is such a complete set of products on the market. But there is a simpler, more feasible way to purchase a small magnetic float level switch installation. The form of the level switch is mainly divided into contact and non-contact.
From a functional point of view, although the result of * is to read a switch signal, it does not need to directly contact the liquid, the interference will naturally be weaker, the non-contact type is powerful, for example, has an alarm function, and the price is higher than the contact. Of course, ultrasonic level switches and radar level switches are one of them.
The contact with the liquid level switch is relatively common. The liquid level switch is directly in direct contact with the liquid to be tested. There are many types, the function is relatively simple, the life is relatively short, and the maintenance period is a bit long. But the price is very cheap.
For example: float ball level switch, liquid level switch electrode type, electronic liquid level switch, stainless steel float ball level switch can withstand high temperature, acid and alkali resistant, electrode type liquid level switch is easy to scale, liquid level switch is easy to install, run Reliable and widely used.