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

io Cloudkompatibel Cloud compatible
50+ in stock!
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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
100.51
94.98
io Cloudkompatibel Cloud compatible
100+ in stock!
Online -5,5 %
AO002Retro-reflective sensor IP69K stainless steel housing
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  • Sensing range 0.05...5 m
  • Red light
  • with polarisation filter
  • Stainless steel housing
  • Light-on/dark-on mode programmable
69.19
65.38
400+ in stock!
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AO006Retro-reflective sensor with PA housing
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  • Sensing range 0.1...7 m
  • Red light
  • with polarisation filter
  • dark-on mode/ normally open
71.79
67.84
50+ in stock!
Online -5,5 %
AO010Retro-reflective sensor M12x1 metal thread
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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
81.17
76.71
31 in stock!
Online -5,5 %
AO014Retro-reflective sensor M18x1 metal thread
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  • Sensing range 0.03...4 m
  • Red light
  • with polarisation filter
  • Metal housing M18 thread
  • dark-on mode/ normally open
63.54
60.05
io Cloudkompatibel Cloud compatible
50+ in stock!
Online -5,5 %
AO021Mini retro-reflective sensor with PA housing
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  • Sensing range 20...1800 mm
  • Red light
  • with polarisation filter
  • with pigtail
  • dark-on mode/ normally open
55.66
52.60
50+ in stock!
Online -5,5 %
AO025Retro-reflective sensor with PA housing
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  • Sensing range 0.05...5 m
  • Red light
  • with polarisation filter
  • Light-on/dark-on mode programmable
49.14
46.44
100+ in stock!
Online -5,5 %
AO029Retro-reflective sensor with PA housing
Go to customer reviews(8)
  • Sensing range 0.05...2.5 m
  • Red light
  • with polarisation filter
  • dark-on mode/ normally open
33.84
31.98

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.