Retro-reflective sensors

With retro-reflective sensors, the transmitter and receiver are located in one housing and combined with a prismatic reflector. The reflector reflects the emitted light beam and if the light is interrupted by an object, the sensor switches. A polarisation filter prevents faulty switching caused by reflective surfaces in the environment. Read more here

Retro-reflective sensors

All items of the category Retro-reflective sensors:

io Cloudkompatibel Cloud compatible
50+ in stock!
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Laser retro-reflective sensor with PA housing
AL006Laser retro-reflective sensor with PA housing
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  • Laser retro-reflective sensor with IO-Link
  • M8 connector (4-pin)
  • with polarisation filter
  • Sensing range 0.075...8 m
  • Light-on/dark-on mode switchable
117.92
111.43
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100+ in stock!
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Retro-reflective sensor/ Photoelectric sensor IP69K
AO002Retro-reflective sensor/ Photoelectric sensor IP69K
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  • Sensing range 0.05...5 m
  • Red light
  • with polarisation filter
  • Stainless steel housing
  • Light-on/dark-on mode programmable
86.60
81.84
10 in stock!
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Retro-reflective sensor/ Photoelectric sensor M12
AO010Retro-reflective sensor/ Photoelectric sensor M12
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  • Sensing range 0.1...0.8 m
  • Red light
  • with polarisation filter
  • Metal housing M12 thread
  • Light-on/dark-on mode programmable
100.47
94.94
50+ in stock!
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Retro-reflective sensor/ Photoelectric sensor M18
AO014Retro-reflective sensor/ Photoelectric sensor M18
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  • Sensing range 0.03...4 m
  • Red light
  • with polarisation filter
  • Metal housing M18 thread
  • dark-on mode/ normally open
76.06
71.88
200+ in stock!
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Retro-reflective sensor/ Photoelectric sensor
AO025Retro-reflective sensor/ Photoelectric sensor
Go to customer reviews(35)
  • Sensing range 0.05...5 m
  • Red light
  • with polarisation filter
  • Light-on/dark-on mode programmable
57.14
54.00
100+ in stock!
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Retro-reflective sensor/ Photoelectric sensor
AO029Retro-reflective sensor/ Photoelectric sensor
Go to customer reviews(13)
  • Sensing range 0.05...2.5 m
  • Red light
  • with polarisation filter
  • dark-on mode/ normally open
40.33
38.11
50+ in stock!
Online -5,5 %
Reflex light barrier/ Photoelectric sensor
AO040Reflex light barrier/ Photoelectric sensor
Go to customer reviews(5)
  • Sensing range 0.1…9 m
  • Red light
  • with polarisation filter
  • Light-on mode & dark-on mode (antivalent)
51.77
48.92
io Cloudkompatibel Cloud compatible
50+ in stock!
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Retro-reflective sensor/ Photoelectric sensor
AO044Retro-reflective sensor/ Photoelectric sensor
Go to customer reviews(9)
  • Sensing range 0.05…7 m
  • red light
  • with polarisation filter
  • light and dark on
  • IO-Link
35.31
33.37

Retro-reflective sensor: How they work

Transmitter and receiver units are located in the same housing and form a retro-reflective sensor in combination with a reflector. The emitted light hits the reflector and is reflected back to the receiver. If the light signal is interrupted by an object, a switching operation is tripped. The receiver of retro-reflective sensors from autosen comes with a polarisation filter. This is why the retro-reflective sensor only works in combination with the appropriate reflector (prismatic reflector) because it reflects back the light being polarised. The decisive advantage is that reflecting surfaces in the surroundings will not cause undesired switching of the sensor.
 

Retro-reflective sensor: Advantages and disadvantages

The retro-reflective sensors require more installation expenditure because the sensor and prismatic reflector have to be aligned appropriately. The range does not depend on the degree of reflection, shape, colour and material of the object. Transparent objects cannot be detected by simple light barriers. Retro-reflective sensors are used for mean distances up to 5 m.
 

Retro-reflective sensor for transparent objects

The optical retro-reflective sensor AO701 from autosen is a special version and suitable to reliably detect transparent films and objects. Common retro-reflective films do not switch if a transparent object is located between transmitter and receiver because the light is not completely weakened by the object. In addition to the reflected light, the optical sensor AO701 also detects the light intensity. That way it is also possible to reliably detect transparent objects weakening the emitted light only. The sensor is so sensitive that even thin films and clear glass are reliably detected.