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Proximity sensor

A proximity sensor is a sensor able to detect the presence of nearby objects without any physical contact. A proximity sensor often emits an electromagnetic field or a beam of electromagnetic radiation, and looks for changes in the field or return signal.



Due to their reliability and efficiency, inductive proximity switches are used whenever a metal object has to be detected within just a few millimeters:

  • Presence detection of a machine component
  • Ultra precise referencing of the zero position of a moving machine component (e.g. in robotics)
  • Detection of different positions (e.g. limit switches)
  • Counting metal objects (e.g. in component feed or conveyor technology)
  • Presence detection of objects in process
  • Rotary speed measurement on metal gear wheel



  • This is a normally open proximity switch sensor with 10mm detection distance.
  • When proximity switch is close to some target object, it will send out control signal.
  • It is a component widely used in automatic control industry for detecting, controlling, and non-contact switching.
  • High sensitivity, quick response, stable performance.
  • Non-contact detection avoids the sensor and the target object from damages.



Model: LJ30A3-10-Z/BX

Detection distance: 10mm±10%

Setting distance: 0-8mm

Delay distance: <10% of detection distance