Infrared sensors / red light sensors

  • Visible red light for easy adjustment
  • Versions for use in hygienic and wet areas
  • LED display to check operation, switching status and function
  • Pushbuttons for quick and easy set-up
  • Wide selection of system components for easy and secure mounting

Photoelectric sensors
Photoelectric sensors as "artificial eyes" are fundamental to the automation technology. They are used where a reliable and non-contact detection of the exact position of objects is required. The material of the object to be detected is of no importance. Compared to inductive sensors, photoelectric sensors have a much higher sensing zone.

Through-beam sensors
Through-beam sensors are distinguished by a long range. The system consists of two separate components: a transmitter and a receiver. The light only travels one way (from the transmitter to the receiver). Adverse effects in the applications, such as dust in the air, dirt on the lenses, steam or mist do not immediately interfere with the system (high excess gain).

Retro-reflective sensors
For retro-reflective sensors the transmitter and receiver are incorporated into one housing. By means of a reflector the transmitted light is returned to the receiver. Retro-reflective sensors without polarisation filter operate in the infrared area, systems with polarisation filter with visible red light.

Diffuse reflection sensors
Diffuse reflection sensors are used for the direct detection of objects. The transmitter and receiver are integrated into one housing. The transmitter emits light which is reflected by the object to be detected and seen by the receiver. The light reflection from an object is evaluated.

Therefore additional functional components (such as reflectors for retro-reflective sensors) are not needed for the operation of a diffuse reflection sensor.

More information

System overview — Photoelectric sensors for general applicationsSelector — Photoelectric sensors for general applicationsProduct Innovations — Photoelectric sensors for general applications

Retro-reflective sensors | ifm
The reflector reflects the light beam:
For a retro-reflective sensor
the transmitter and receiver are integrated into one housing.

Photoelectric sensors | ifm
Artificial eyes: Photoelectric sensors are used to detect positions in automation technology.