Accurate Robust Measurements

Frequently playing critical roles in automotive and industrial equipment, sensing technologies must be highly accurate, reliable and robust. Magnetoresistive (MR) sensors fulfil all these requirements and bring a whole range of benefits too. For example they perform their measurement duties without needing to touch the parts they are measuring. This means wear-free operation that doesn’t affect the measurement process.

Common-sense sensors for exceptional systems

Our sensors are based on the MR effect, in which a magnetic field can affect a material’s electrical resistance. In MR sensors, the electrical resistance of a current-carrying magnetic material, such as a permalloy (19% Fe, 81% Ni) is altered by an external magnetic field. By applying the field in the plane of the current flow, the material’s own internal magnetization vector rotates according to the angle of the field, changing its electrical resistance.

Analog to digital

A subsequent intregrated circuit transforms the analogue into a digital output signal. The output levl is independent of the sensing distance within the measurement range

The MR effect

The exceptional accuracy, reliability and robustness of MR sensors make them ideal for automotive applications. Applications can employ a wide air gap between sensor and target. This is possible due to conditioning the MR sensor’s signal, where the offset, gain and hysteresis are digitally adapted to ensure an exceptional air gap capability.

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