The bottom-mounted magnetic flap level gauge is installed by vertically inserting the measuring main pipe (including the float) of the magnetic flap level gauge from the bottom of the container upwards.

• Solving Specific Installation Challenges: This is the only available installation method for magnetic float level gauges when it is impossible or inconvenient to drill holes in the top and side walls of the container, but there are conditions for drilling holes at the bottom.
• Easy Observation and Maintenance: The indicator is located at the top or above the side, usually at a height easily observable by the human eye, eliminating the need to climb the tank. Maintenance can be carried out by isolating at the bottom.
• Suitable for High-Pressure Containers: Sometimes, on high-pressure spherical tanks or reactors, drilling holes at the bottom is more structurally reasonable or there are spare interfaces compared to drilling holes on the side walls.
• Retains the Advantage of Intuitive Display.

• Some special chemical reaction vessels or storage tanks: Their structural design only allows for available interfaces at the bottom, and the medium is clean, stable, and not prone to sedimentation.
• Renovation of some existing old equipment: Due to the original opening position, it is done out of necessity.
• Small pressure vessels: Used as local indication and not strictly requiring emptying.

In the vast majority of engineering designs and instrument selections, bottom-mounted magnetic flap level gauges are generally avoided as much as possible. Engineers prefer to choose top-mounted magnetic flap level gauges, or, when there is no alternative, select other types of level gauges with different principles (such as single-flange differential pressure transmitters, radar level gauges, etc.) for the bottom interface to circumvent its structural drawbacks.