SICK Retroreflective Photoelectric Sensor, Block Sensor, 20 mm → 350 mm, PNP, IP69K

SICK W12 Series Photoelectric Sensor, IP69K, PNP Output - WTB12-3P1131

This photoelectric sensor detects objects using a reflected light principle and is designed for industrial automation environments. Built with a robust metal enclosure and a retro-reflective sensing arrangement, it is intended for panel installation in systems that require Compact block-style sensing. The unit operates across a broad temperature range and connects via an attached cable to supply and control circuits.

Features & Benefits

• PNP output enabling simple integration with control logic
  Operates up to 30V DC meeting low-voltage system requirements
  Maximum current 100 mA minimises load on supply lines
  Response time 330 μs for Rapid detection and cycle timing
  IP69K rating permitting high-pressure, high-temperature washdowns
  Withstands -40 to 60 °C for harsh environment stability

**Applications**

• Suitable for conveyor presence detection where fast switching matters
  Ideal for packaging machinery requiring washdown-capable sensors
  Used for object sensing in assembly lines with panel-mount installations
  Can be used for level detection with retro-reflective targets in manufacturing

How is the sensor connected into plant wiring?

It uses an integral cable termination for direct connection to control inputs and power rails without separate Terminal blocks.

What construction features aid durability in corrosive wash environments?

The metal housing combined with an IP69K ingress rating protects internal electronics against pressurised, high-temperature cleaning processes.

How does the sensor’s light source affect performance?

An LED emitter provides stable illumination for consistent retro-reflective detection and predictable switching characteristics.

What approvals or standards does it meet for international deployment?

It holds multiple regulatory and safety recognitions including EN IEC 63000 and a range of national certifications for use in varied markets.

Notes

For retro-reflective sensors a suitable reflector is required.
For PL80A, PL30A & C110 reflectors see stock nos. 265-2776, 265-2760 & 265-2748 respectively.