Magnetic Float Level Gauge vs. Magnetic Flap Level Gauge

Magnetic Float Level Gauge: Generally used with display instruments or transmitters, it provides continuous level signal output, suitable for precise level control and monitoring.

Magnetic Flap Level Gauge: Displays the liquid level directly on the gauge through changes in the color of the flip plate, making it intuitive and easy to read, but typically only provides qualitative level information.

Magnetic float level gauges can be made of stainless steel, ceramic, etc. For high-temperature conditions (e.g., 520℃), alumina ceramic floats are required.

Magnetic flap level gauges primarily use aluminum foil and ceramic for the flip plate; plastic materials are prone to deformation and jamming due to high temperatures.

Magnetic Float Level Gauge: This instrument relies on a float that floats in the liquid. As the liquid level rises or falls, the float changes accordingly. The float contains magnetic elements that magnetically couple with a sensor installed in the instrument, converting the level change into an electrical signal for accurate measurement. It can be said that it utilizes the principle of natural buoyancy combined with magnetic induction technology, making the measurement both accurate and sensitive.

Magnetic flap level gauge: In contrast, the magnetic flap level gauge relies on the principle of magnetic coupling. As the liquid level rises and falls with the float, it triggers the internal magnetic float to flip. This flipping is often accompanied by a color change, visually indicating the liquid level. Although this design is simple in structure, it is sufficient to meet the needs of intuitive monitoring of the liquid level under certain special working conditions.

Magnetic Field Design

The float of the magnetic float level gauge adopts a 360° annular magnetic design to enhance magnetic field stability.

The magnet of the magnetic flap level gauge is usually located at the bottom of the float, and the flipping plate is driven by magnetic coupling torque.

Due to the use of advanced sensing technology, the magnetic float level gauge can generally provide high measurement accuracy and a wider measurement range, making it suitable for industrial applications with high data accuracy requirements.

Although the measurement accuracy of the magnetic flap level gauge is relatively lower, it can still maintain a stable working state in some harsh environments due to its simple structure and strong anti-interference ability.

Magnetic float level gauge: Suitable for various media, including corrosive and high-viscosity media.

Magnetic flap level gauge: Also suitable for various media, but may have limitations for viscous or magnetic media.

Magnetic float level gauge: Demagnetization of the float magnet (requires regular remagnetization), or obstruction by impurities (Example: a sugar factory's syrup tanks require monthly cleaning).

Magnetic flap level gauge: Wear of the float shaft (Example: a coking plant's ammonia tanks have a 3-year replacement cycle), or strong magnetic field interference (must be kept at least 2 meters away from the motor).

Magnetic float level gauge: May require a more complex installation and calibration process.

Magnetic flap level gauge: Relatively simple to install and maintain.

Magnetic float level gauge: Due to its high precision and wide measurement range, it is suitable for applications requiring high-precision measurement data, such as precision chemical and pharmaceutical production. However, its performance may be affected under certain harsh environments.

Magnetic flap level gauge: Simple in structure and intuitive in display, they are particularly suitable for use in harsh conditions, such as high temperature, high pressure, or volatile media environments. For some applications that do not require particularly high precision, it remains an economical and practical choice.