WL12-3P2431 Retro-reflective Sensor 7m PNP IP69K | SICK

The Original New SICK WL12-3P2431 (1041436) is a compact retro-reflective photoelectric sensor from the W12-3 series, designed for reliable object detection in industrial automation and control environments. Its autocollimation optical design requires no minimum distance to the reflector, allowing installation in space-constrained machinery. A visible red LED light source with a polarising filter ensures stable detection of shiny or reflective targets. Housed in a robust metal enclosure rated IP66/IP67/IP69K, the sensor withstands high-pressure washdown and demanding industrial conditions. It provides a PNP complementary output with selectable light/dark switching and is configured via a 5-turn potentiometer.

Core Engineering Highlights:
Retro-reflective sensor with autocollimation (no minimum reflector distance) | 0 m … 7 m maximum sensing range (0 m … 5 m typical) | Visible red LED, 640 nm | PNP complementary output (light/dark switching) | ≤ 330 µs response time / 1,500 Hz switching frequency | 10–30 V DC supply voltage | IP66 / IP67 / IP69K metal housing | M12 4-pin connector | –40°C to +60°C operating temperature

Key Features:

• Original New SICK WL12-3P2431 sensor (part no. 1041436)

• Autocollimation optical principle — no minimum distance to the reflector required

• Polarising filter for reliable detection of reflective and shiny objects

• Visible red LED light source (640 nm) with a Ø 100 mm light spot at 3 m

• PNP complementary output with light/dark switching selectable

• 5-turn potentiometer for sensitivity adjustment

• Green LED for power indication, yellow LED for received light beam status

• Robust metal housing with PMMA front screen

• Circuit protection: reverse polarity (A), interference suppression (C), output overcurrent and short-circuit (D)

• Includes 2 × BEF-KH-W12 mounting brackets with screws

Applications:

• Conveyor object detection using a reflector

• Machine safety presence-sensing

• Packaging automation lines with PLC integration

• High-pressure washdown production areas

• Panel-mounted sensing in compact assemblies

• General factory automation requiring reliable retro-reflective detection

Technical Specifications:

Footnotes:
¹ Reflector PL80A.
² Average service life 100,000 h at TU = +25°C.
³ Limit values, operation in short-circuit protected network max. 8 A.
⁴ May not exceed or fall short of UV tolerances.
⁵ Without load.
⁶ Signal transit time with resistive load.
⁷ With light/dark ratio 1:1.
⁸ A = UV connections reverse-polarity protected; C = interference pulse suppression; D = outputs overcurrent and short-circuit protected.

System Compatibility:

• Compatible with standard industrial controllers accepting PNP discrete inputs.

• M12 4-pin connector mates with standard M12 female cordsets.

• Requires a suitable reflector for operation (e.g., PL80A, C110A, PL20A, or reflective tape).

• Mounts via the included BEF-KH-W12 brackets with standard hole spacing.

Related Products:

• PL80A – Fine triple reflector for maximum 7 m sensing range

• C110A – Standard reflector for 4.5 m sensing range

• PL20A – Compact reflector for 5 m sensing range

• BEF-KH-W12 – Mounting bracket (included with sensor, also available separately)

• YF2A14-xxxVB3XLEAX – M12 straight female cordset, 4-pin, various lengths

PLC ERA is an independent industrial automation distributor supplying genuine Original New products through established global supply channels. All products are factory sealed when applicable and undergo quality inspection prior to shipment. SICK and W12-3 are trademarks of SICK AG.