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# What is the working principle of a flow switch?

What is the working principle of a flow switch?

There are many different types of flow switches in different types of flow switches, but it is certain that the flow switch is used in applications with fluid control. It is common in industry and life. To understand the scope of application of the flow switch and application notes, you need to thoroughly understand the working principle of the flow switch. First, the flow switch has a fluid channel, the calcium channel inside the shell, the channel is equipped with a piston with permanent magnets.
May 9, 2017
At work, the fluid will give some pressure, when the piston is caused by the pressure caused by the liquid flow, the magnetic piston will make the device inside the seal reed switch action, the piston diameter determines the start flow. If the flow is reduced, the pressure will change, then the stainless steel spring will push the piston to reset. If the reed switch is activated, it can be remote alarm or instructions, but also can be integrated in the automatic control system. These are the simple operating principles of the flow switch. In the flow switch, the magnetic flap level gauge works according to the principle of constant buoyancy, the float in the measuring tube with the level of the rise and fall on the move, the permanent magnet within the float through the coupling, driving red, white turned Column reversed 180 degrees, the liquid level rises when the column from white to red, down from red to white, in order to achieve liquid level instructions.
May 9, 2017
However, the working principle of the float level gauge is based on the principle of variable buoyancy, the buoy in the bucket wall with the liquid level movements up and down, the buoy on the pull up the spring force and liquid level is proportional to the spring force caused by the test Angle of the size, to detect the level of the level. There are many types of flow switches, there is a relatively common thermal diffusion flow switch, the principle of some different from the general, generally based on thermal diffusion to control.
May 9, 2017
Thermal diffusion technology is a technology with excellent performance and high reliability under harsh conditions. The typical principle is that when one of the two sensing elements is placed in the fluid, one of them is heated and the other is used to sense the process temperature. The temperature difference between the two sensing elements is related to the fluid flow rate and the original properties of the fluid. The temperature difference between the two sensing elements of the thermal diffusion flow switch is maximum if there is no flow condition, but as the flow rate increases, the heated sensing element is cooled and the temperature difference is gradually reduced. In this process, the flow rate of the fluid will directly affect the degree of thermal diffusion.
May 9, 2017

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