How Magnetic Float Level Switches Work?

The principle of operation of the floating magnetic level switches is to use a magnetic field to open or close the circuit when the liquid level in the chamber increases or decreases. Inside the stainless steel float, the basic principle of fluctuation, according to which the force acting on a floating object is equal to the mass of the liquid displaced by the object. Partially submerged in the surface of the liquid, the float moves inside the chamber while the fluid level moves, allowing precise movement of the liquid surface.

The use of magnetic fields to open and close switching points in many floating point switches is widespread and is used in many areas. It is a simple and intelligent technique to measure and maintain a level. When the float moves with the liquid level, it causes the magnetic sheath to slide in or out of the magnetic field, which activates the switch and makes it work. The tube of a non-magnetic barrier effectively insulates the switching mechanisms of the controlled fluid.

LIQUID LEVEL MAGNETIC SWITCH

The liquid level magnetic sensor consists of two main components: a magnet integrated in the float and a blade switch housed in the housing. A single block or multiple blade switches are firmly placed in stainless steel or in a plastic bar and a permanent magnet is sealed inside the float. Its rise and fall lead to the opening or closing of a mechanical switch by direct contact or in the vicinity of the blade switch due to the magnetic field.

It may not be difficult to imagine a magnet placed on a float and not use the concept of using magnetic fields to work on a liquid level switch. However, a little harder to understand the reed switch. The blade switch consists of two ferromagnetic contact points, called “blades”, which are placed in a glass tube. When the magnet passes the contacts in the sealed switch, they remove or touch and close the signal circuit between the two conductors.

HOW IS IT ESTABLISHED?

The float moves on the surface of the working fluid and precisely follows the movement of the fluid surface. Increasing the liquid level raises the float and pulls the attraction sleeve inside the protective tube into a magnetic field to activate an electrical or pneumatic switch. This indicates the presence of liquid.

Subsequently, a fall in the liquid level decreases the float when the glove is removed from the magnetic field to turn off the electric or pneumatic switch. This indicates the absence of liquid. As a general rule, magnetic float detectors can operate in high temperature conditions and are sometimes useful for detecting nearby interfaces.

Thanks to the use of a permanent magnet floating switch and a Reed contact, the change is made without contact, does not wear out and does not require a power supply. All functions of the floating magnetic switch are completely independent of vibrations, bubble formation, foam, conductivity and harmful fumes.

APPLICATIONS

The magnetic float level sensors can provide level measurements for virtually any type of fluid. When used correctly, floating switches can provide millions of on / off cycles for years of reliable operation. They are ideal for narrow differential systems, such as high or low level alarms and factory controls. You will find them wherever there is a pump and a level control, that is, where the liquid enters and leaves the tanks, pressure tanks or tanks:

1. Chemical industry
2. Petrochemical industry
3. Natural gas
4. At sea
5. Naval building
6. Mechanical Engineering
7. Electric equipment
8. Energy plants
9. Treatment of process water and drinking water.
10. Locomotives and railway equipment.
11. All terrain vehicles
12. Mass storage terminals
13. Textile, pulp and paper industry.
14. Food, dairy products and dairy products.