SICK WL11G-2B2531 1041390 Retro-reflective Photoelectric Sensor

SICK WL11G-2B2531 is a compact retro-reflective photoelectric sensor designed to reliably detect transparent objects and materials. It is equipped with a visible red light source (640 nm) and a polarizing filter to effectively handle glass, plastic bottles, films and other shiny, see-through items. The sensor's integrated PinPoint LED technology generates a tight, bright spot, providing high performance even in changing application conditions. A high-resolution 11-turn potentiometer enables precise sensitivity adjustment, while the versatile PNP/NPN push-pull output and selectable Light/Dark switching modes offer flexible alignment to your control system and application requirements.

Applications:

• Glass, plastic bottle, film and blister pack detection in packaging lines

• Counting container on high-speed conveyors and beverage fillers

• Transparent object detection in pharmaceutical, food and beverage industries

• Roll diameter monitoring in paper, textile and printing equipment

Core Specifications:

• Functional principle: Photoelectric retro-reflective sensor, autocollimation

• Polarising filter: ✔

• Sensing range max.: 0 m … 4 m (with reflector PL80A)

• Light source: LED, visible red light (λ = 640 nm)

• Light spot size: Ø 25 mm (at 1.5 m distance)

• Supply voltage: 10 V DC … 30 V DC

• Switching output: PNP, NPN (push-pull)

• Switching mode: Light/dark switching (selectable via L/D control cable)

• Output current Imax.: ≤ 100 mA

• Response time: ≤ 330 µs

• Switching frequency: 1,500 Hz

• Connection type: Male connector M12, 5-pin

• Adjustment: Potentiometer, 11 turns

Advanced Specifications:

• Enclosure rating: IP66, IP67, IP69K

• Ambient operating temperature: –30 °C … +60 °C

• Storage temperature: –40 °C … +75 °C

• Dimensions (W × H × D): 15.6 mm × 48.5 mm × 42 mm

• Weight: 120 g

• Housing material: Plastic, ABS

• Optics material: Plastic, PMMA

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

• Protection class: II

• UL File No.: NRKH.E181493 & NRKH7.E181493

System Integration:

• This sensor belongs to SICK W11G‑2 series. A reflector, such as PL80A, must be ordered separately, as it is not included with the sensor

• Mounts via standard through‑holes (1 inch spacing) and dovetail grooves, compatible with a wide range of SICK bracket systems

• Versatile PNP/NPN push‑pull output and selectable light/dark switching modes integrate directly with standard industrial controller inputs

• Bright, highly visible 360° status LEDs provide on‑the‑spot diagnostics, simplifying setup and troubleshooting

Standards & Compliance:
Refer to manufacturer official documentation for detailed certification and compliance information.

Related Products:

• PL80A – Fine triple reflector for max. 4 m sensing range (required for operation)

• BEF‑W11A – Mounting bracket for flexible sensor positioning

• YF2A14‑020VB3XLEAX – Pre‑assembled M12 straight female connector cable, 5‑pin, 2 m, PVC

• YG2A14‑020VB3XLEAX – Pre‑assembled M12 angled female connector cable, 5‑pin, 2 m, PVC