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Small rectangular red plastic sensor housing with M8 connector and mounting bracket

Sick

Sick WLL170-2P430 Fiber-optic Sensor PNP Red

SKU CH-7VDS-FG6R2

Fiber-optic sensor with PNP output detects objects up to 4,000 mm using visible red LED light

  • Labor warranty1 Year
  • Product typeTest Equipment
  • Color and finishRed
  • Number of items1 pack
  • Sold asBox
  • Parts warranty3 Years
  • Visible red LED for clear alignment
  • Sensing up to 4 000 mm through-beam
  • PNP output with 100 mA load capacity
  • IP66 enclosure resists dust and water jets
  • Compact 10.5 mm x 35.5 mm x 83.7 mm housing

SICK WLL170-2P430 Fiber-optic Sensor

The SICK WLL170-2P430 is a rectangular fiber-optic sensor designed for industrial detection tasks. It uses visible red light at a 660 nm wavelength emitted from an LED source. The unit offers a maximum sensing range of 4,000 mm in through-beam configuration and up to 700 mm in proximity mode. It operates on a 10 to 30 V DC supply voltage with PNP switching output.

Installation and Common Issues

The sensor features an M8 4-pin male connector for straightforward electrical integration. A BEF-WLL170 mounting bracket is supplied for mechanical fixation. Sensitivity is adjusted via a 10-turn potentiometer while a sliding switch selects a 40 ms off-delay. The IP66-rated ABS/PC housing withstands temperatures from –25 °C to +55 °C. Wiring errors on the 4-pin connector or incorrect light/dark mode selection typically cause setup faults.

100 mA PNP Switching Output

The single PNP switching output delivers a maximum current of 100 mA at a 2,000 Hz switching frequency. Response time is rated at 250 µs for high-speed detection. This output specification determines compatibility with your PLC or controller input cards. The sensor includes circuit protection rated A through D and meets Protection Class III requirements.

How it compares

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

Price $143.99
Pricier than about 66% of the 5,006 comparable items (median $95.99).

Specifications

Product
Brand nameSick
Model nameSICK WLL170-2P430
Product typeTest Equipment
Color and finishRed
In the box
Number of items1 pack

Questions about this item

How do I confirm the sensor is operating correctly after installation?

The LED indicator shows switching status and the PNP output toggles within 250 µs when the red 660 nm beam is interrupted or reflected within the 0–4,000 mm through-beam or 0–700 mm proximity range.

What comes in the box and what must be purchased separately?

The box includes the WLL170-2P430 sensor and a BEF-WLL170 mounting bracket; an M8 4-pin male connector cable for the 10–30 V DC supply and output is not supplied.

Which sensing range suits my application — through-beam or proximity?

Choose through-beam for up to 4,000 mm detection with a separate receiver, or proximity for diffuse reflection up to 700 mm (160 mm with standard fibre) using the built-in red LED and 10-turn potentiometer.

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