The working principle and application of float switch. Float switch is a simple and reliable liquid level control device, which has a wide range of applications in industrial automation, household water systems, agricultural irrigation, and environmental monitoring. The following is a detailed introduction to the float switch.
1、 Overview of float switch
Float switch, also known as float level switch or float type water level switch, is a liquid level control device designed based on the principle of buoyancy. It uses the changes in float and liquid level to control the on/off of the switch, without the need for power supply, without complex circuits, with a simple structure and easy to use.
2、 Working principle
The working principle of the float switch is based on buoyancy. When the liquid level changes, the float ball connected to the switch will float up and down accordingly. The floating ball is equipped with a magnet inside. When the floating ball follows the rise of the liquid level, the magnetic body suspended in the switch body also rises, and finally touches the metal plate on the magnetic switch, causing the switch to close. On the contrary, when the floating ball follows the decrease of the liquid level, the magnetic body descends and the magnetic switch is disconnected. In this way, the automation of liquid level control can be achieved through the float level switch.
3、 Technical advantages
1. Simple structure: The float switch has a simple structure without complex circuits and mechanical connections, making it less susceptible to interference.
2. Easy to use: As long as the material is selected correctly, the float switch can be suitable for any type of liquid, pressure, and temperature environment.
3. Long working life: The float switch does not contain vulnerable parts such as bellows, springs, etc., so its working life is relatively long.
4. Safe and reliable: The float switch adopts magnetic coupling effect for switch control, completely isolated from liquids, so it can be safely used on high temperature and high pressure equipment.
4、 Application Fields
Float switches have a wide range of applications in multiple fields:
1. Industrial automation: In industrial fields such as generator equipment, petrochemicals, and hydraulic machinery, float switches are used to monitor and control the liquid level of storage tanks, ensuring production safety and continuity.
2. Household water system: In the household bathroom, the toilet water tank uses a float switch to control the inlet valve, accurately adjust the water level, and achieve the goal of water conservation and efficient operation.
3. Agricultural irrigation: In the agricultural irrigation system, the float switch can automatically turn on or off the irrigation pump according to the water level changes in the groundwater pool, optimizing the utilization of water resources.
4. Environmental monitoring: In the field of environmental protection, such as sewage treatment plants, float switches monitor the liquid levels of sewage tanks and clarification tanks, participate in regulating the treatment process, and prevent overflow pollution to the environment.
5. Ship and Navigation Engineering: Float switches are also important components for monitoring the bottom water level and preventing seawater intrusion.
5、 Product classification
Float switches can be classified into various types based on their materials and characteristics:
1. Plastic materials: such as all PP materials, PP+NBR floating balls, PVDF, Teflon, etc. These materials have characteristics such as non toxicity, temperature resistance, acid and alkali corrosion resistance, and are suitable for liquid level control in different media.
2. Stainless steel: All stainless steel material has the characteristics of long service life, high temperature resistance, and is suitable for water, oil, and weak acid-base environments. In addition, there is a high-temperature resistant stainless steel float switch suitable for oil high-temperature environments.
6、 Summary
The float switch has become an effective tool for achieving automation control and liquid level management due to its simple structure, convenient use, long working life, and safety and reliability. Float switches play an important role in various industrial, household, agricultural, and environmental fields. With the continuous advancement of technology and the expansion of application fields, the performance and application scope of float switches will also continue to improve and expand.
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- Guangzhou Xinhong Automation Equipment Co., Ltd
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Phone: 13332800523
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Email: Eason.su@gzxinhongtech.com.cn
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The working principle and application of float switch
View：363 Release Date：2024/8/31 15:06:57