Magneto-inductive distance sensors


Flexible sensor concept, ideal for serial applications and OEM


Ideal alternative to switches and proximity sensors


Linear output signal


Magneto-inductive distance measurement

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mainSENSOR is based on an innovative measuring principle, which has been developed by Micro-Epsilon in order to combine the advantages of both inductive and magnetic sensors. Magneto-inductive sensors are frequently used as alternative to inductive sensors and proximity sensors in process automation, the packaging industry and in machine monitoring. Measuring the distance to a magnet which is fixed at the measurement object, the sensor outputs a continuous, linear signal. As different strength magnets are applied, measuring ranges of between 20 mm and 55 mm can be achieved. However, in order to adapt the measuring range, it is only necessary to change the magnet.


  • Magneto-inductive displacement and distance measurement
  • Ideal alternative to inductive sensors and proximity sensors
  • Linear output signal, high basic sensitivity and temperature stability
  • Selectable measuring ranges up to 55mm with different magnets
  • Long-life sensor due to non-contact measurement
  • Ideal for customer-specific designs and serial applications

Flexible sensor concept

Due to their flexible concept, the sensors are ideal for a wide range of applications, particularly where large numbers of pieces are required. The standard sensors are designed in a stainless steel M12, M18 and M30 or a flat plastic housings suitable for industrial applications. Customer-specific modifications to the plate and sensor housing can be easily carried out for serial applications.

Defining the measuring range using magnets

With the magneto-inductive measuring principle, the magnets used act as target. However, in order to change the measuring range, it is only necessary to exchange the magnet. Further calibration or sensor settings are superfluous. Therefore, measuring ranges of 20 to 55mm can be achieved using only one sensor.

Measurement through objects

Unlike conventional measuring methods, the magneto-inductive sensors enable measurements through non-ferromagnetic materials, particularly metals such as aluminum or stainless steel. A clear benefit is provided here as the sensor and the magnet can be installed separately in applications with closed systems or housings. It is therefore possible to mount the sensor safely in harsh environments.

Suitable for speed measurement

mainSENSOR is also used for rotational speed measurement. In order to do so, one or two magnets are mounted on the rotating measuring object. Regardless of the direction of rotation, the sensor measures the speed of the target object.