S51 M18 Tubular

Key Features

  • Flat plastic housing
  • Selectable dark or light output
  • Cable or M12 connection with NPN or PNP output
  • Standard 3 wire connection configuration


The S51 series offers a cost-effective solution in M18 photoelectric sensors, with a wide range of operating distances. The diffuse proximity model has a 10cm fixed operating distance with a wide emission spectrum. Also available is a version with a 1 - 40cm adjustable operating distance. Standard retro-reflective models have an operating distance up to 4m while the polarized retro-reflective models, used for reliable detection of reflective objects, are fitted with a sensitivity adjustment and have a 3.5m operating distance. The emitter and receiver models, used for longer operating distances, reach 18 meters.

The S51 series sensors, with cable or M12 connector and PNP or NPN output, provide a 3-wire connection configuration in compliance with the EN60947-5-2 standard. The normally open output is activated in light mode in proximity models and in dark mode in retro-reflective models. The output mode can be inverted using the dark/light selection input wire provided, making these extremely versatile sensors.

Description File Type File Size Download
IDEC DataLogic Short Form Catalog PDF 2.2MB Download
Sensor Catalog PDF 9.32MB Download
Quick Selection Guide PDF 600KB Download
IDEC DataLogic Sensor Catalog PDF 8.7MB Download
Sensor Cross Reference PDF 132KB Download
Catalog PDF 307KB Download
Datasheet PDF 251KB Download
Instruction Sheet PDF 106KB Download