Through-beam sensors

The system consists of two separate components: a transmitter and a receiver. The transmitter emits pulsed light in the infrared or visible red wavelength range. The receiver detects the light beam and immediately converts a beam interruption caused by an object in the sensing zone into a switched signal.
Type M12 M18 rectangular	Material metal plastics	Range up to 4 m up to 6 m up to 15 m up to 60 m up to 80 m	Connection cable cable with connector connector terminals	System hazardous areas (ATEX) function check output timer food industry mounting and handling technology

Retro-reflective sensors

For a retro-reflective sensor the transmitter and receiver are incorporated into one housing. By means of a reflector the transmitted light is returned to the receiver. An object in the beam path interrupts the beam and triggers a switching operation. Retro-reflective sensors without polarisation filter operate in the infrared area, systems with polarisation filter with visible red light.
Type M12 M18 M30 rectangular	Material metal plastics	Range up to 2 m up to 4 m up to 10 m up to 18 m up to 22 m	Connection cable cable with connector connector terminals	System hazardous areas (ATEX) function check output timer food industry mounting and handling technology polarisation filter glass and film detection

Diffuse reflection sensors

A diffuse reflection sensor is used for the direct detection of objects. As with a retro-reflective sensor transmitter and receiver are incorporated into one housing. The transmitter emits light which is reflected by the object to be detected and seen by the receiver. This system does not evaluate the interruption of the light beam but the reflected light of an object. Important: The switching function referred to light-on / dark-on mode is therefore reversed. The transmitted light of this system is also pulsed.
Type M12 M18 M30 rectangular	Material metal plastics	Range up to 150 mm up to 400 mm up to 800 mm up to 1500 mm up to 3500 mm	Connection cable cable with connector connector terminals	System hazardous areas (ATEX) function check output timer food industry mounting and handling technology short ranges background suppression

Optical fork and angle sensors

As is the case with through-beam sensors transmitter and receiver are arranged face to face. Both components are permanent parts of a fork or an angle, i.e. they do not have to be aligned towards each other. If an object enters the detection zone, the light beam is interrupted and a switching signal is generated. Optical fork and angle sensors use a particularly fine light beam and are thus suitable for the detection of tiny objects.
Type Optical fork sensor Optical angle sensor	Material metal	Fork width / sensor width up to 10 mm up to 20 mm up to 30 mm up to 50 mm up to 60 mm up to 80 mm up to 100 mm up to 120 mm	Connection connector

Infrared heat sensors

Infrared heat sensors absorb the infrared radiation emitted by the object in wave lengths on µm and convert it into a switching signal. So the object itself acts as a transmitter for the sensor. The spectrum of the emitted infrared radiation directly depends on the temperature of the object. The decisive advantage of these sensors as compared to temperature probes (such as PT100) is that there is no mechanical contact between the object and the sensor.
Type cylindrical M30	Material metal		Connection cable connector