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Rectangular stainless steel sensor with red LED and two metre PVC cable

Sick

SICK WL170-P122 Photoelectric retro-reflective sensor PNP

SKU CH-2DN8-6AQAQ

Photoelectric retro-reflective sensor with PNP output, 0.1 to 0.6 m range, IP67 stainless housing, 2 m PVC cable

  • Detects objects up to 0.8 m with retro-reflective sensing
  • Operates on 10 V to 30 V DC supply voltage
  • IP67 enclosure resists dust and water ingress
  • Compact 12 mm × 37 mm × 28.6 mm stainless-steel housing
  • Selectable light/dark switching via L/D control cable

SICK WL170-P122 retro-reflective sensor

The SICK WL170-P122 is a photoelectric retro-reflective sensor designed for industrial automation and material-handling tasks. It detects objects by reflecting a visible red LED beam off a separate reflector. The sensor supplies a PNP switching output with selectable light or dark switching via an L/D control cable. A 2 m PVC cable provides the electrical connection.

Thermals noise and power draw

The unit operates from a 10 V DC to 30 V DC supply with a maximum ripple of ±10 % and draws 30 mA. Its stainless-steel and ABS housing is rated IP67 for dust and water ingress. Ambient operating temperature spans –25 °C to +55 °C, while storage temperature reaches –40 °C to +70 °C. No active cooling or moving parts are present, so acoustic noise is negligible.

Sensing range and response time

The sensor achieves a maximum sensing range of 0.1 m to 0.8 m and a specified operating range of 0.1 m to 0.6 m. Response time is 0.7 ms, and attenuation along the light beam is 20 %. Buyers needing longer detection distances or faster switching speeds should consider alternative sensing technologies.

How it compares

Measured against everything we stock in Electrical Trade Tools & Kits, at today’s prices. Recalculated every night.

Price $85.99
Cheaper than about 57% of the 5,006 comparable items (median $95.99).

Specifications

Product
Brand nameSICK
Model nameSICK WL170-P122

Questions about this item

How do I mount the 12 mm wide rectangular housing and wire the 2 m PVC cable for the PNP output?

Secure the stainless steel housing with M3 screws on the 12 mm x 37 mm footprint, then connect the brown wire to 10 V DC to 30 V DC, blue to ground, and black to the load; use the L/D control cable to select light or dark switching.

What part will need replacement first in a dusty, wet environment?

The plastic PC optics window is the only wear item; clean it regularly and replace the sensor if scratches or clouding reduce the 20 % attenuation margin.

At what ambient temperature does the 0.7 ms response time stop being guaranteed?

The 0.7 ms response time is specified up to +55 °C; above that temperature the sensor may still operate to +70 °C storage limit but switching speed is not characterised.

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