Registration Sensors

Registration sensors, sometimes referred to as contrast sensors, are sensors designed to detect the differentials of either light intensity, colour or some other contrast factor. As such they are considered vital when ensuring consistency or triggering machine processes in automated manufacturing. For example, an automated cutter might be triggered to cut at the detection of certain colour change in the material that is being cut.

The sensors are usually programmable to the user's requirements, often with the ability to set specific registration marks, and can be optimised for high-speed industrial production applications. Wherever precisely triggered actions are needed to respond to set parameters, registration sensors are usually an integral part of the control system.

What is the difference between colour sensors and contrast sensors?

Able to respond to the difference in the consistency of a material surface, contrast sensors can usually be programmed with an easy to use 'teach' function that allows the sensor to recognise both the mark and the background. As they are generally lightweight and easy to use, they are employed in a variety of mass production applications. Colour sensors essentially fulfil the same purpose as contrast sensors and in much the same way, except they are designed to recognise a specific colour, which may make them more suitable for tasks where the material being sensed has a distinctive colour markings.

What are light intensity sensors?

Light intensity sensors, or luminescence sensors, are designed to detect differences in the levels of light on a surface. While they can be used in much the same way as colour or contrast sensors, they are not able to specifically detect a certain colour or contrast in colour, but differences in light levels. As such, they are suited to more specialist environments and materials.


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RS Stock No. 213-1791
Mfr. Part No.LUT9B-11626
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£1,066.14
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150 mm - NPN, PNP 100 mA 6.5 KHz Male Connector M12 - 10 → 30 V dc Yes 5-pin, Male connector M12 Metal LUT9 IP67 -
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RS Stock No. 213-1751
Mfr. Part No.KTM-MN31181P
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£197.71
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12.5 mm - NPN 50 mA 15 KHz Male Connector M8 - 12 → 24 V dc Yes 4-Pin, Male Connector M8 Plastic KTM Prime IP67 -
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RS Stock No. 213-1799
Mfr. Part No.LUTM-UN81162P
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£277.18
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12.5 mm - NPN 100 mA 6 KHz Cable with M12 Male Connector - 12 → 24 V dc Yes 4 Pin, Cable With M12 Male Connector Plastic LUTM IP67 -
RS Stock No. 134-8373
Mfr. Part No.45CRM-4LHT2-D4
£167.00
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11 mm RGB LED NPN/PNP x 2 60 mA 8 (Flashing) Hz 4-Pin M12 Micro Quick Disconnect - 10 → 30 V dc Yes 4-Pin Connector Die Cast Zinc 45CRM IP67 IO-Link
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RS Stock No. 213-1754
Mfr. Part No.KTM-MP31182P
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£197.71
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12.5 mm - PNP 50 mA 15 KHz Cable with M12 Male Connector - 12 → 24 V dc Yes 4-Pin, Cable With M12 Male Connector Plastic KTM Prime IP67 -
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RS Stock No. 213-1747
Mfr. Part No.KTL180-MP4P41ZZZZZ
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£177.85
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- - PNP 100 mA 31.2 KHz Male Connector M8 - 12 → 24 V dc Yes 4-Pin, Male Connector M8 Plastic KTL180 IP50 -
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RS Stock No. 213-1794
Mfr. Part No.LUT9U-11306
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£984.79
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50 mm - NPN, PNP 100 mA 6.5 KHz Male Connector M12 - 10 → 30 V dc Yes 5-pin, Male connector M12 Metal LUT9 IP67 -
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RS Stock No. 213-1729
Mfr. Part No.CSM-WP11122P
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£216.63
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12.5 mm - PNP 100 mA 1.7 KHz Cable with M12 Male Connector - 12 → 24 V dc Yes 4-Pin, Cable With M12 Male Connector Plastic CSM IP67 -
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RS Stock No. 213-1753
Mfr. Part No.KTM-MP31181P
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£197.71
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12.5 mm - PNP 50 mA 15 KHz Male Connector M8 - 12 → 24 V dc Yes 4-Pin, Male Connector M8 Plastic KTM Prime IP67 -
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RS Stock No. 213-1745
Mfr. Part No.KT8L-P3756
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£721.80
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150 mm - PNP 100 mA 17 KHz Male Connector M12 - 10 → 30 V dc Yes 5-pin, Male connector M12 Metal KT8 IP67 -
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RS Stock No. 213-1744
Mfr. Part No.KT8L-P3656
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£721.80
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150 mm - PNP 100 mA 17 KHz Male Connector M12 - 10 → 30 V dc Yes 5-pin, Male connector M12 Metal KT8 IP67 -
RS Stock No. 2550074656
Mfr. Part No.R58ECRGB1
£261.45
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Mfr. Part No.XUYPSCO929L2SP
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