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Photoelectric sensors

Impressive specialist sensors that check for presence, shape, colour, distance and thickness

Optoelectronic sensors

Photoelectric sensors check presence, shape, colour, distance, and thickness - optimised for robotics, automation, assembly, and handling. They are real experts with various strengths: detecting and counting parts, monitoring stack heights, through-glass detection, aligning small parts, detecting marks, fill level detection, and much more!

The wide Balluff spectrum offers every light type, whether red light, infrared or laser technology, in different ranges. With and without background suppression. Various designs – also in mini version – ensure a wide variety of possible applications. Our photoelectric sensors are optimized for robotics, automation, installation and handling.


  • Part recognition and counting
  • Stack height monitoring
  • Detection through glass
  • Small parts detection
  • Brand recognition
  • Fill level detection and much more

Diffuse and through-beam sensors

  • With diffuse, through-beam and retro-reflective sensors

Diffuse sensor

  • Ideal for recognition of contrast variations, as recognition is dependent upon surface, color and material
  • Economical and easy to mount and align
  • Shorter ranges as compared to retro-reflective and through-beam sensors
  • Only one electrical device to mount

Diffuse sensor with background suppression

  • Reliable detection virtually independent of surface, color and material – also suitable for the detection of objects in front of a very close background, and for dark objects in front of a light background
  • Almost constant scanning range even with different reflectance

Retroreflective sensors

  • Simple alignment thanks to generous mounting tolerances
  • Large reflectors for high ranges
  • Reliable detection independent of surface, color or material
  • With polarizing filter for detecting shiny objects

Through-beam sensors

  • Ideal for positioning tasks with excellent repeatability
  • Large function reserve, very resistant to dirt
  • Reliable detection independent of surface, color or material – flawlessly recognizes even very shiny objects
  • Ideal for large ranges

Fork sensors

  • Different light types (red or infrared, laser)
  • Robust metal housing
  • Simple alignment to the object
  • High optical resolution and reproducibility
  • Fork widths from 5…220 mm with standardized mounting holes
  • Identical mechanical and optical axes
  • High process reliability since the transmitter and receiver are firmly aligned to each other
  • Save time and expense – only one electrical connection is required

Angle sensors

  • Ideal for every application thanks to different light types (red light, infrared, laser)
  • Robust metal housing
  • Extremely flexible mounting thanks to its angled shape
  • High optical resolution and reproducibility
  • Identical mechanical and optical axes
  • High process reliability since the transmitter and receiver are permanently aligned with each other
  • No time-intensive adjustment
  • Large selection of different shapes and sizes

Optical windows

  • Uniformly high resolution over the whole area of the frame
  • Detects small parts down to 0.8 mm diameter
  • Robust metal housing with M8 standard plug connector
  • Adjustable sensitivity and output signal length
  • Dynamic and static variants
  • Modular construction kit with numerous frame sizes

Light grid

  • Different lengths available
  • Also suitable for large objects with a range of up to 2.1 m
  • Ideal for counting due to its quick reaction time
  • Robust metal housing
  • Invisible infrared light
  • Switching output (PNP) and analog output (0…10 V)
  • Simple connection, easily-assembled installation without additional equipment
  • Ready to use – no parameter setting necessary

Light bands

  • Applicable for zones 2G/1D and 3G/3D
  • Robust metal housing
  • Light band with a width of 50 mm
  • Distances up to 2 m possible
  • Excellent resolution from 0.01 mm
  • Two freely configured analog outputs
  • Three programmable digital outputs
  • Intelligent noise contour suppression
  • Self-contained device – no additional accessories such as controller, PC, or software required
  • Consistent, homogeneous light array

Color sensors

  • High switching frequency
  • With or without display
  • Robust and industrial grade
  • Large operating ranges of up to 400 mm thanks to a strong white light
  • Optionally with IO-Link interface for simple parameterization
  • Differentiation between any number of objects (255 can be learned directly)
  • Very high color resolution
  • Application-specific parameterization

Contrast sensor

  • For fast processes thanks to highly accurate switching – high switching frequency up to 30 kHz
  • Different light types (laser/red/green/blue or white light)
  • Large ranges with laser
  • Highly visible light spots
  • Pulse extensions
  • Outside Teach-in possible
  • Also available with analog output signal
  • Available with display for simple setup
  • Different model series for different applications

Luminescence sensor

  • UV light – no external lamp or light source required
  • Programmable with the touch of a button – without separate software
  • Robust, industrial-grade configurations

Fiber-based devices for plastic and glass fibers

  • For detecting low contrast differences
  • Very fast – up to 8 kHz
  • High positioning accuracy
  • Flexibly mountable, simple to install
  • Mechanically robust
  • With one-way or detecting principle
  • Straight or angled optics
  • Compact configuration for mounting on DIN rails
  • With or without display
  • Different light types (red or infrared)
  • Also optionally available with analog output signal
  • For glass or plastic fibers

Plastic and glass fibers for fiber-based devices

  • Various lengths and diameters
  • Crush-resistant and oil-resistant
  • High function reserve
  • Coaxial fiber arrangement as an option
  • Field-attachable versions available

Micromote - optical sensor heads

  • Large selection of sensor heads with maximum precision: Microspot, Nanospot, lasers, infrared, classic red-light LEDs
  • Amplifier for analog, digital, dynamic
  • Display indication of target and actual values
  • Convenient operation
  • Extremely flexible sensor cable
  • Outstanding technical parameters
  • Rugged, for challenging environments
  • Ideal for use in grippers
  • Elegant, seamless integration into machines

Micromote - amplifiers for optical sensor heads

  • Especially small for flexible use and application
  • Combines an external processor unit (amplifier) with exceptionally small photoelectric sensor heads
  • Suitable even for extremely constricted spatial conditions and moving machine elements

Photoelectric distance sensors

  • Long ranges of up to 20 m
  • Large range of product variants
  • High process accuracy
  • Easy to operate