Sick
Sick WL170-N122 Photoelectric Retro-reflective Sensor NPN electrician tool
Photoelectric retro-reflective sensor detects objects from 0.1 m to 0.8 m with NPN output and IP67 stainless steel housing
- Retro-reflective sensing up to 0.8 m range
- Visible red LED for easy alignment
- NPN output with selectable light/dark switching
- IP67 stainless steel housing resists harsh environments
- 10–30 V DC supply suits industrial systems
Sick WL170-N122 Retro-reflective Sensor
The Sick WL170-N122 is a photoelectric retro-reflective sensor built for industrial detection tasks. It operates on a 10 V DC to 30 V DC supply and provides an NPN switching output with selectable light/dark switching via an L/D control cable. The rectangular stainless steel housing measures 12 mm x 37 mm x 28.6 mm and carries an IP67 enclosure rating. A 2 m PVC cable with 0.18 mm² conductors handles the connection.
Suited for short-range presence detection
This sensor suits automation engineers who need reliable object detection between 0.1 m and 0.6 m using visible red light. The 0.7 ms response time supports fast cycling on conveyors or packaging lines. Buyers who require longer sensing distances beyond 0.8 m or a PNP output type should look at alternative sensor models. The fixed cable connection also limits use where quick-disconnect connectors are preferred.
Stable output under continuous operation
Under sustained load the sensor maintains consistent switching performance thanks to its low 30 mA power consumption and ±10 % ripple tolerance. The stainless steel and ABS housing resists mechanical stress while the plastic PC optics withstand repeated exposure in harsh environments. Operating temperatures from –25 °C to +55 °C ensure dependable behaviour across extended shifts without thermal drift affecting the 20 % attenuation specification.
Highlights
- Retro-reflective sensing up to 0.8 m range
- Visible red LED for easy alignment
- NPN output with selectable light/dark switching
- IP67 stainless steel housing resists harsh environments
- 10–30 V DC supply suits industrial systems
Specifications
| Brand | SICK |
|---|---|
| Model | SICK WL170-N122 |
Questions about this item
What power supply do I need for the WL170-N122 sensor?
The sensor operates on 10 V DC to 30 V DC with a maximum power consumption of 30 mA and a ripple tolerance of ±10 %.
Can the WL170-N122 replace an older sensor that uses a PNP output?
No, this model provides an NPN switching output only; it is not compatible with systems that require a PNP signal.
How do I verify the WL170-N122 is detecting correctly after installation?
Use the L/D control cable to select light or dark switching, then confirm the output toggles within 0.7 ms when a reflector is present at 0.1 m to 0.6 m.
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