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Photoelectric Sensors

World leading background suppression providing live sensor data for IoT

Versatile and highly sensitive, Contrinex photoelectric sensors deliver long-distance, non-contact detection of metallic and non-metallic targets, accommodating variable target color and surface finish. High-frequency switching circuitry senses small, fast-moving objects, even against non-contrasting backgrounds. Photoelectric sensors direct light beams – emitted by a laser diode or LED – toward a distant target.
Different operating principles detect either light reflected from the target (energetic-diffuse and background-suppression sensors) or the interruption of the beam by the target (reflex and through-beam sensors). Through-beam sensors utilize a separate receiver, allowing longer sensing distances. Other variants contain a transmitter and a receiver in a single housing. Conveying the light beam into confined spaces using optical fibers eliminates any electrical hazard at the sensing point, ideal for flammable atmospheres.

Want to know more?

First class

sensing ranges


background suppression characteristics

Light sources:

red, infrared, laser and pinpoint LED


to mount


  • Rugged diffuse or through beam sensors in housing
  • Extremely compact self contained
  • Accurate target detection due to focused red light beam
  • Long sensing ranges


  • Distance setting by potentiometer or teach in
  • Large selection of types, including cylindrical light beam, multi-beam, liquid level monitoring, low-and high-temperature
  • Diffuse or through-beam sensing, axial or radial
  • Synthetic fibres with bending radii from 2mm, suitable for cutting on site


  • High precision and repeatability
  • Settable analog range for optimum distance measurement
  • Enclosure rating IP67 / IP69K
  • Ecolab approved

Transparent Object

  • Light sources: UV and LED
  • Highly reliable reflex system
  • C23 plastic housing, 20 x 30 x 10 mm
  • IO Link interface available on PNP types

Colour and Contrast

  • Rugged housing, 40 x 50 x 15 mm
  • Connector adjustable at 0°, 45° and 90°
  • 5 switching tolerance levels

Light Grids

  • Fast response time 0.8ms … 4.8ms
  • Ideal for detection and counting of even the smallest objects
  • Resolution: 0.9 mm, 2 mm, 4 mm, 8 mm or 25 mm
  • Detection height: up to 2,010 mm

Fork Sensors

  • High resolution: Ø0.1 – 0.2 mm
  • High frequency up to 14 kHz
  • 4 sensor modes: standard, high resolution, power, speed
  • Sensitivity adjustment allowing detection of transparent objects

Interested? Click here for a quote.