How does the magnetic flap level gauge work? A piece of article will explain it clearly for you!

In the vast industrial production system, liquid level measurement is like a precise "wise eye", playing a crucial role in ensuring the stable and efficient operation of the production process. From large storage tanks in the petrochemical industry, to boiler water tanks in the power sector, and to production tanks in the food and beverage industry, the accurate detection of liquid levels is of great significance. And the magnetic flap level gauge, with its unique working principle and outstanding performance advantages, has become a trusted liquid level measurement tool in many industrial fields.    
            
    I.Working principle: The ingenious combination of buoyancy and magnetism        
    The design of the magnetic flap level gauge is inspired by the principle of buoyancy and the interaction of magnetism. It mainly consists of a main tube connected to the measured container, a magnetic float with permanent magnets inside, and an external display panel (composed of red and white dual-color magnetic flip columns). When the liquid level in the measured container changes, the magnetic float inside the main tube will move up and down synchronously due to the buoyancy effect.Furthermore, the permanent magnet steel inside the float drives the magnetic flip column on the external display panel to rotate 180 degrees through the magnetic coupling effect. When the liquid level rises, the flip column changes from white to red; when the liquid level drops, the flip column changes back from red to white. Through the color change of the flip column, people can intuitively and clearly read the liquid level height, achieving visual monitoring of the liquid level. This non-contact measurement method not only avoids the faults caused by mechanical friction in traditional liquid level meters, but also ensures the safety and reliability of the measurement process. Even in harsh industrial environments, it can operate stably.        
            
    II. Product Advantages: Fully meets industrial requirements        
    Intuitive and clear display        
    The display panel of the magnetic flap level gauge is designed uniquely. The scale marks and numbers have been thickened, significantly enhancing the visibility and viewing angle. Whether in outdoor storage tanks exposed to strong light or in indoor production workshops with dim lighting, operators can easily and quickly read the liquid level data. The dual-color flip column design is even more eye-catching, clearly distinguishable in various ambient light conditions, providing great convenience for liquid level monitoring during the production process.        
            
    Convenient for installation and maintenance        
    The modular design is adopted, with a simple main structure. The main components include the main tube, float, display panel and connection flange. There are no complex moving parts. The installation methods are flexible and diverse. The side-mounted type is suitable for large vertical containers, such as oil storage tanks and fire-fighting water tanks; the top-mounted type is for spherical tanks, horizontal tanks, etc., where the top opening is restricted. Moreover, the liquid level gauge is equipped with a stop valve. When cleaning, maintenance or replacing components are needed in the later stage, it can be operated without stopping the machine, effectively reducing maintenance costs and time, and improving production efficiency.        
            
    Widespread usability        
    It has excellent pressure and temperature resistance properties. The upper limit of working pressure can reach 1.0 MPa, and the working temperature range covers -20℃ to 200℃. It can adapt to extreme working conditions such as high-temperature steam and low-temperature liquefied gas. For viscous or easily solidifying media, a steam jacket or electric heating device can be optionally selected to ensure the fluidity of the medium during the measurement process and guarantee the measurement accuracy.It also performs exceptionally well in terms of anti-corrosion and explosion-proof capabilities. It offers inner liner and plastic types of liquid level gauges specifically designed for harsh corrosive environments, capable of withstanding strong corrosive media such as hydrofluoric acid and concentrated sulfuric acid. At the same time, it has received dual certifications for flameproof type (Exd IIC T6 Gb) and intrinsically safe type (Ex ia IIC T6 Ga), with a protection level of IP66/IP67. It can be safely applied in oil and gas storage and transportation, as well as pharmaceutical and other flammable and explosive locations.        
            
    High precision and reliability:        
    With its stable structure and advanced measurement principles, the magnetic flap level gauge has high measurement accuracy and the error can be controlled within a small range. During long-term use, it is not easily affected by external interference and can always maintain reliable performance, providing accurate liquid level data for industrial production and effectively avoiding equipment failures and production accidents caused by abnormal liquid levels.        
            
    III. Application Areas: Facilitating the Development of Various Industries        
    Petroleum and chemical industry        
    During the processes of petroleum refining and chemical production, the monitoring of liquid levels in various storage tanks and reaction vessels is of great significance. Magnetic flap level gauges can display the liquid level heights of crude oil, refined oil products, and chemical raw materials in real time. Combined with magnetic switches, they can achieve high and low liquid level alarm functions, effectively preventing incidents such as tank overflow or emptying.For instance, in the storage tank area of a large oil refinery, by using magnetic flap level gauges in conjunction with an automated control system, remote monitoring and automatic fluid replenishment can be achieved, significantly enhancing the safety of production and management efficiency.        
            
    Power Industry         
    The water level of the boiler water tank is a key indicator for the safe operation of the power plant. The magnetic flap level gauge, with its high-temperature-resistant design and steam jacket insulation measures, can accurately measure the water level of water at temperatures above 200℃. It can also detect and prevent boiler dry burning or water overflow accidents caused by false water levels.After adopting advanced magnetic flap level gauges in a certain thermal power plant, the measurement error of water level was significantly reduced, the operational stability was greatly improved, and the continuous and stable supply of electricity was ensured.        
            
     Food and drinks industry        
    In a hygienic production environment, the hygiene requirements for liquid level measurement equipment are extremely high. The plastic type magnetic flap level gauge adopts FDA material bodies and food-grade sealing rings, and its fully enclosed structure effectively prevents the growth of bacteria. It is widely used for liquid level monitoring in equipment such as beer fermentation tanks and dairy product storage tanks, ensuring the hygiene safety and quality stability of the food and beverage production process.        
            
    IV.Installation location and environmental requirements 
    Verticality control: The body of the liquid level gauge must be completely perpendicular to the ground, with an inclination angle error of ≤ 2°. It is recommended to calibrate using a level gauge. When installing, it is recommended to reserve a space of ≥ 100mm at the bottom of the body and a margin of ≥ 50mm at the top to avoid the influence of thermal expansion and contraction.
Avoid interference sources: Installation is prohibited in strong magnetic fields (within 30 meters of large motors), areas with severe vibration (vibration intensity > 5mm/s), or areas with high temperature radiation sources (＞60℃). This may lead to magnetic coupling failure or mechanical damage.
Media compatibility: The material of the body (such as 304SS/316L) must be resistant to media corrosion, and the sealing surface of the flange should use PTFE gaskets. For media with excessive chloride content, double-phase stainless steel materials should be selected.

    Avoid interference sources: Installation is prohibited in strong magnetic fields (within 30 meters of large motors), areas with severe vibration (vibration intensity > 5mm/s), or areas with high temperature radiation sources (＞60℃). This may lead to magnetic coupling failure or mechanical damage.        
    Media compatibility: The material of the body (such as 304SS/316L) must be resistant to media corrosion, and the sealing surface of the flange should use PTFE gaskets. For media with excessive chloride content, double-phase stainless steel materials should be selected.