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Small rectangular photoelectric sensor with red laser emitter and M12 connector

Sick

Sick WL9L-3P2432 Photoelectric Sensor PNP

SKU CH-8W4R-KMHRW

Compact photoelectric retro-reflective sensor with laser light source, PNP complementary output and IP66/IP67/IP69K enclosure

  • Detects small objects with a 1 mm laser spot at 500 mm
  • IP66, IP67 and IP69K enclosure resists harsh wash-down environments
  • Laser class 1 visible red light at 650 nm for safe operation
  • PNP complementary output switches up to 100 mA at 1,000 Hz
  • Compact 12.2 x 52.2 x 23.6 mm housing fits tight machine spaces

Sick WL9L-3P2432 Retro-Reflective Sensor

The Sick WL9L-3P2432 is a compact photoelectric retro-reflective sensor with autocollimation for detecting small objects. It emits visible red laser light at 650 nm and offers a maximum sensing range of 12 m. The housing measures 12.2 mm x 52.2 mm x 23.6 mm and weighs 13 g. It is designed for industrial automation tasks requiring precise detection.

Check Supply Voltage And M12 Wiring

Verify that your system provides a DC supply between 10 V and 30 V with ripple below 5 Vpp before installation. The sensor draws up to 30 mA and connects via a 4-pin M12 male connector. Ensure your controller accepts a PNP complementary output capable of 100 mA switching current. Confirm the mounting surface suits M3 holes and the IP66 IP67 IP69K rating matches your environment.

Low Heat Low Noise 30 mA Draw

Power consumption stays at 30 mA across the 10 V to 30 V range, so heat generation is minimal in normal operation. The solid-state output switches at 1,000 Hz with a 0.5 ms response time, producing no audible noise. Laser class 1 certification per IEC 60825-1 and CDRH 21 CFR 1040.10 1040.11 confirms safe emission. The plastic VISTAL housing and PMMA optics withstand –10 °C to +50 °C ambient temperatures.

How it compares

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

Price $155.99
Pricier than about 70% of the 5,006 comparable items (median $95.99).

Specifications

Product
Brand nameSICK
Model nameSICK WL9L-3P2432

Questions about this item

What comes in the box with the WL9L-3P2432 and what must I buy separately?

The sensor ships as a single unit. A mating M12 4-pin cable or connector is not included and must be purchased separately for power and signal wiring.

How do I choose between the listed sensing ranges of 0-12 m max and 0-8 m typical?

The 12 m figure is the absolute maximum under ideal conditions with a suitable reflector; the 8 m value is the practical range for reliable detection. Select based on your actual working distance and reflector quality.

What does the 1,000 Hz switching frequency mean when the sensor is installed on a production line?

It allows the sensor to resolve up to 1,000 switching events per second, so objects passing the 0.5 ms response time can be detected reliably at high line speeds.

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