Inductive distance measuring sensors AlphaProx

Technologically high-quality analog sensors for industry, the building sector or process chemistry

Inductive sensors measure the position changes of metal objects without contacting them. The ever increasingly optimized repeatability paired with the outstanding precision in measuring paths, angles, and positions when applied increase the productivity of every machine.

  • Portfolio
    • Miniature sensors

      • Completely integrated processing electronics
      • For applications in cramped spaces
      • Wide variety of designs


      Robust sensors

      • Robust stainless steel housing
      • Long-term seal as per IP 69K thanks to the proTect+ impermeability concept
      • High signal quality in an extended temperature range

      Sensors with programmable outputs

      • Output characteristic programmable via cable
      • Additional programmable digital output
      • Various designs

      Inductive sensors for the ex-area

      • For environments with flammable gas and dust
      • High repeatability
      • Compact design


    • Highly accurate sensors

      • Very high resolutions in the nanometer range
      • Low linearity error
      • Configurable via Teach-in

      Standard sensors

      • Dimensions from 4 to 30 mm for every requirement
      • Absolute distance measurement up to 16 mm
      • Completely integrated processing electronics

      Hygienic and washdown sensors

      • FDA-compliant, Ecolab-tested
      • Long-term seal as per IP 69K thanks to the proTect+ impermeability concept
      • Easy to retrofit because of its backwards compatibility to standard inductive sensors


    Areas of application

    • Tape tension control and monitoring

      • High control quality at high frequencies possible
      • The sensor performs two functions: distance measurement (analog) and end position shut-off (digital)
      • Through teach-in the sensor measuring range can optimally be adapted to different roller diameters

      Vibration measurements on shafts and bearings

      • Bearing play or true running measurements
      • Measurement of distances to 1 μm
      • Mounting is possible even in extremely limited spaces (amplifier is integrated in the sensor)
      • Very rapid movements can be measured
      • Miniature sensors also available in a connector version

      Absolute distance and angular measurement

      • High reliability thanks to contact less measuring
      • Dirt-resistant measuring system
      • Measurement of linear and rotary movements possible
      • Compact sensor sizes allow mounting even in limited spaces
    Special features
    • Miniature housing

      Featuring a diameter of 4 mm, the IWRM 04 may be referred to as the smallest distance measuring inductive sensor with an integrated amplifier.

      Flexible thanks to teach-in

      Sensors with a teach-in input can optimally be adapted to the respective application conditions. Both the analog output and an additionally integrated switching output can be configured with the very easy teach-in routine.

      Temperature-stable at large measuring distances

      Baumer sensors feature high temperature stability at large measuring distances. Over 80% of all industrial applications are exposed to temperatures between +20 … +50° C. In the 0 … +60° C range, these sensors have a negligible temperature drift.

      Very high EMC

      Resistance to electromagnetic disturbances is an important factor when it comes to the practical use of sensors. The EMC limit values of Baumer sensors considerably exceed sensor standard specifications, guaranteeing very high operational safety.