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Explore the influence of the strength of the magnetic field on the magnetic flap level gauge

Author:    Source:    Date: 2021-07-15 15:32:07
The magnetic level gauge is a liquid level sensor, which is used to measure the definition of fluid level. Magnetic level gauges include "floatable" devices that can float in high-density and low-density fluids. The electromagnetic level gauge can also be designed to withstand harsh environmental conditions up to 210 bar at 370°C.
elecrtric heat tracing level gauge
 The magnetic float level sensor involves the use of a permanent magnet sealed inside the float. The rise and fall of the float will cause the mechanical switch to open or close by directly contacting or approaching the reed switch. For a mechanically driven float, the float is directly connected to the micro switch.

 For magnetic and mechanical float level sensors, chemical compatibility, temperature, specific gravity (density), buoyancy and viscosity will affect the choice of valve stem and float. For example, a larger float can be used for liquids with a specific gravity as low as 0.5, while still maintaining buoyancy.

 The choice of float material is also affected by temperature-induced changes in specific gravity and viscosity (changes that directly affect buoyancy).

 Exploring the physics and engineering behind this design requires studying basic magnetism. The standard bar magnet has two magnetic poles: North and South. (North will be shown as positive on the Gauss meter, and South will be negative.) Use magnetic flux lines to draw the magnetic field.

 These lines are graphical representations of the magnetic field density. They show the direction of the magnetic field and represent the relative field strength-the closer the lines are, the stronger the magnetic field. The flux lines will always move from the north pole to the nearest south pole, and always leave and enter the surface at 90° or perpendicular to the surface.

 They can only travel along straight or curved paths, which means they never change direction suddenly. The flux lines will also always follow the path of least reluctance. Most importantly, they can never cross each other.

 When choosing a magnetic level meter, it is important to consider the strength of the magnetic field. The magnetic field is that the stronger the heart magnetic field of the liquid level gauge, the more reliable the function of the instrument.

 Some manufacturers' magnetic level gauges use a single magnet, which causes the strength of the north field to be the same as that of the south field and weaker than the south field.

 Obviously, in the position of indicator, switch and transmitter, the magnetic field will not be so strong. Some manufacturers use a single ring magnet in their float design, while other manufacturers use a series of single magnets in a circular array.

 In this design, the relative field strengths of the north and south poles will be equal to each other and less than the relative field strength of the dual magnet design. In addition, when you pass between the various bar magnets, the field strength traveling around the circle will have high and low points.

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