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The top-mounted magnetic flap level gauge is suitable for measuring the level in various containers where it is not convenient to install level gauges on the side, especially for measuring the level in underground tanks. It is widely applicable to industries and sectors such as petroleum, chemicals, metallurgy, power, light industry, and pharmaceuticals. The top-mounted magnetic flap level gauge is installed directly on the top of the container. As the float moves up and down with the liquid level (or interface), it drives the magnetic linkage to move as well. The magnets contained within this linkage use the principle of magnetic coupling to activate the magnetic flap indicator, which then displays the liquid level or interface level in the process container in a clear and intuitive manner using red and blue colors (red for liquid, blue for gas). This allows for remote transmission of data and automatic control. The top-mounted magnetic flap level gauge mainly consists of a body section, an on-site indicator, a remote transmitter, and upper and lower limit alarms. Working principle of the top-mounted magnetic flap level gauge: It consists of a body (comprising upper and lower conduits), a flap box (made up of red and white magnetic flaps), a float (composed of a magnet, a push rod, and a float cylinder), as well as a level transmitter; its structure is shown in the figure. The working principle is as follows: the float inside the container (developed for different media and pressures) moves up and down in the lower conduit in response to changes in the liquid level, and through a push rod it causes the magnet to move up and down within the upper conduit. This in turn causes the flap outside the main body to flip, with red and white colors being used to indicate the liquid level. At the same time, the level transmitter sends the liquid level signal to the control center for display and control; centralized monitoring can also be carried out via a computer. In the industrial sector, magnetic flap level gauges are widely used; their primary function is to monitor and indicate the liquid level in containers. First of all, we need to know that the magnetic flap level gauge can be installed either on the side or at the top. It is usually installed on the outside or top of the container. In addition, magnetic switches and reed switch remote transmitters are also used in conjunction with this magnetic flap level gauge, allowing us to monitor the liquid level in real time even from a distance. Installation method of top-mounted magnetic flap level gauge The top-mounted magnetic flap level gauge generally consists of an upper and a lower section. The upper part consists of the main measuring tube of the level gauge; a display panel with magnetic flaps is attached to the outside of this tube and is used to indicate the liquid level. This section is installed at the top of the container and connected to the container’s flanges via flanges. DN80 or DN100 flanges are generally suitable, with the flange specification should not be less than DN80 ； The lower part is the guide tube, which serves as a passage for the float. Inside this guide tube, the float is connected to the magnetic float ball located in the upper measuring tube through a linkage. When the liquid level changes, the float causes the magnet to move up and down within the guide tube; the magnetic coupling effect of the upper float is then used to drive the switch elements in the display panel to flip, thereby indicating the liquid level. A reed switch level transmitter can also be attached outside the float to enable remote signal transmission and automatic control. The proper functioning of a top-mounted magnetic flap level gauge is closely related to whether it has been installed correctly. During installation, the following points should be noted: 1. When installing a magnetic flap level gauge, the protective guide tube and the main measuring tube must remain vertical; the connecting rods of the upper and lower floats must not bend and must be inserted straight ； 2. The installation location of the magnetic flap level gauge should be away from the liquid filling port, to prevent the gauge’s protective tube or float from being subjected to impacts ； 3. The installation connection flange should not be chosen to be too small, as this can lead to excessive blind areas. Additionally, with a small protective cylinder, the resistance to the movement of the float is higher, making it easy for the float to get stuck. It is generally advisable to use a connection flange with a diameter of at least DN80 ； 4. When installing an anti-corrosion level gauge, be careful not to damage the anti-corrosion layer, as this could render it ineffective ； 5. When the installation height reaches 4–5 meters, it is recommended to add fixing cables on both sides to ensure that the instrument is not damaged in harsh measurement conditions, such as environments with vibrations, exposure to impacts, or strong winds. Only with proper use, regular inspection, and maintenance can a top-mounted magnetic flap level gauge operate safely and reliably, thereby extending its service life. For more information, please visit the company’s official website at http://www.yb1518.com/. Please keep this link when reproducing the content! http://www.yb1518.com/UploadFiles/201385152424176.jpg