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The potentiometer technique is one of the most used tecniques on the market, and Regal have more than 20 years of experience. It is a very simple way to design and produce sensors in different angles and strokes, and thereby many times offer a cost effective solution. Even though this technique has been around for a while, it is still used widely. The conductive ink and design has been developed very much to gain better life time and durability.
The magnetostrictive technique is since long time an established technique and are used in all areas of the market to detect a position. It offer a very exact output signal and the moving parts have no connection to each other, which gives extremely long mechanical life time.
Hall-effect-sensors uses a technique where a difference of potential occur between semi conductor plates when they are exposed to a magnetic field. The base Hall-element uses the variation of the distance to the magnet to detect the angle...
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There are many types of inductive sensor types. We are only working with sensors that give continuous output along the stroke. The inductive technique uses the change of the inductance in a coil when a metal core or a "screen tube" is pushed through/over. With this as a base, several versions are built to achieve different effects. The technique is contact less which gives minimal wear as the moving parts has no contact to each other.