Magnetic level indicator
An alternative to the famous level viewing glasses are magnetic indicators. These are similar processes to floats, but there is communication between the float and the fully magnetic indicator (also called bypass).
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| Figure 1.1: Level Gauge by Wika |
The float contains a strong permanent magnet. This entire system moves over an auxiliary column (communicating vessel). Together with this column, there is another externally which is attracted by the float's magnet and a metal follower moves, which has the function of indicating the level.
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| Figure 1.2: (a) Schematic of a magnetic level indicator and (b) photographs of level indicators that use this principle. |
Figure 1.2 shows the schematic of a level gauge using a magnetic indicator.
Many manufacturers provide floats for different fluids such as butane, propane, oils, acids, water, or even the interface between two fluids, featuring a wide range of different floats, which can withstand high temperatures, high pressures, and corrosive fluids.
These devices can still be integrated with other technologies, such as level measurement by magnetostrictive effect.
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