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. 213-1767
Mfr. Part No.KTS-WB9414115AZZZZ
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13 mm - PUSH/PULL 100 mA 50 KHz Male connector M12 IO-LINK 10 → 30 V dc Yes 5-pin, Male connector M12 Plastic KTS Prime IP67 IO-Link
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RS Stock No. 213-1763
Mfr. Part No.KTM-WP1A182V
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£248.80
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11 mm - PNP 50 mA 15 KHz Cable with M12 Male Connector - 12 → 24 V dc Yes 4-Pin, Cable With M12 Male Connector Metal KTM Prime IP69K -
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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. 213-1783
Mfr. Part No.KTX-WP91142252ZZZZ
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£403.00
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13 mm - PNP 100 mA 50 KHz Male Connector M12 - 10 → 30 V dc Yes 5-pin, Male connector M12 Plastic KTX Prime IP67 -
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RS Stock No. 213-1790
Mfr. Part No.LUT8U-11321
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£893.02
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50 mm - NPN, PNP 100 mA 2.5 KHz Male Connector M12 - 10 → 30 V dc Yes 5-pin, Male connector M12 Metal LUT8 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 -
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RS Stock No. 213-1757
Mfr. Part No.KTM-WN11182P
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£206.23
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12.5 mm - NPN 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 -
RS Stock No. 180-6334
Mfr. Part No.KTX-WP91142252ZZZZZZZZZZZZZZZ1
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£403.00
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13 mm RGB LED PNP 100 mA 50 kHz M12 Male Connector - 10.8 → 28.8 V dc Yes M12 Male 5-pin Connector Vistal KTX IP67 -
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RS Stock No. 213-1764
Mfr. Part No.KTS-WB41141142ZZZZ
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£274.34
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13 mm - PUSH/PULL 100 mA 25 KHz Male Connector M12 - 10 → 30 V dc Yes 4-pin, Male connector M12 Plastic KTS Core IP67 -
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RS Stock No. 213-1795
Mfr. Part No.LUT9U-11326
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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 -
RS Stock No. 134-8363
Mfr. Part No.42JT-F5LET1-P4
£114.00
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12 mm White LED Push-Pull 25 mA 1.5 (Flashing) Hz 4-Pin M12 Micro Quick Disconnect - 10 → 30 V dc Yes 4-Pin Connector ABS 42JT IP67, IP69K IO-Link
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RS Stock No. 213-1784
Mfr. Part No.KTX-WP9114225UZZZZ
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£403.00
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13 mm - PNP 100 mA 50 KHz Male Connector M12 - 10 → 30 V dc Yes 5-pin, Male connector M12 Plastic KTX Prime IP67 -
RS Stock No. 134-7829
Mfr. Part No.KTM-WP117A1P
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£215.69
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12.5 mm RGB LED PNP 50 mA 15 kHz 4-Pin M8 Connector - 12 → 24 V dc Yes 4-Pin Connector ABS KTM IP67 IO-Link
RS Stock No. 180-6345
Mfr. Part No.KTS-WB9124115AZZZZ
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£379.35
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25 mm RGB LED Push-Pull 100 mA 50 kHz M12 Male Connector - 10.8 → 28.8 V dc Yes M12 Male 5-pin Connector Vistal KTS IP67 -
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RS Stock No. 213-1786
Mfr. Part No.KTX-WP9214225AZZZZ
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£403.00
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13 mm - PNP 100 mA 50 KHz Male Connector M12 IO-LINK 10 → 30 V dc Yes 5-pin, Male connector M12 Plastic KTX Prime IP67 IO-Link
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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. 213-1800
Mfr. Part No.LUTM-UP81162P
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£277.18
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12.5 mm - PNP 100 mA 6 KHz Cable with M12 Male Connector - 12 → 24 V dc Yes 4 Pin, Cable With M12 Male Connector Plastic LUTM IP67 -
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RS Stock No. 213-1749
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£158.93
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12.5 mm - NPN, PNP 50 mA 10 KHz Male Connector M8 - 12 → 24 V dc Yes 4-Pin, Male Connector M8 Plastic KTM Core IP67 -
RS Stock No. 134-8372
Mfr. Part No.45CRM-4LHT1-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. 213-1758
Mfr. Part No.KTM-WN117A1P
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£215.69
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12.5 mm - NPN 50 mA 15 KHz Male Connector M8 IO-LINK 12 → 24 V dc Yes 4-Pin, Male Connector M8 Plastic KTM Prime IP67 IO-Link