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As a magnetic measuring instrument, a magnetic flap level gauge ceases to function properly once it loses its magnetism. So why does this happen? Is it possible to avoid or resolve this issue? Let’s find out below. Let’s first discuss the reasons for demagnetization of the magnetic float in high-temperature magnetic level gauges: 1. The residual magnetism of hard magnetic materials changes over time; due to various internal factors, this residual magnetism eventually becomes less than the coupling threshold value ； 2. High-performance hard magnetic materials exhibit hydrogen embrittlement. 3. The operating temperature is higher than the Curie temperature of the hard magnetic material ； The solutions to the demagnetization problem of magnetic flap level gauges can be categorized into the following aspects: From a usage perspective, users should follow these steps: 1. Select the appropriate model when placing an order, ensuring that the operating temperature does not exceed the nominal temperature specified for the magnetic flap level gauge ； 2. During use, it is necessary to constantly monitor the performance of the level gauge (to ensure it is functioning properly), as well as record the actual temperature of the medium. I have seen situations where the actual operating temperature is often higher than the temperature indicated in the specifications; those who created those specifications may have overlooked certain factors. II. From a design perspective, it is necessary to select appropriate hard magnetic materials. For example, magnetic materials with a Curie temperature that is at least 20% higher than the operating temperature should be chosen, to ensure that the residual magnetism remains above the critical value after five years (the magnetic float level gauges designed and manufactured by our company require a coupling critical value of around 1400 gauss). III. From the perspective of magnetic flap level gauge production, the following points should be considered when manufacturing magnetic floats: 1. Cooling measures must be taken during welding (TIG welding) to prevent the temperature at the magnetic material of the float from exceeding its Curie temperature ； 2. The magnetic float is filled with an inert gas (such as argon). 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/image/2010-11//201011191011384084.jpg