SICK WTB8-P2231 6033209 W8 Photoelectric Proximity Sensor PNP 300mm M8

SICK WTB8‑P2231 (6033209) is a miniature diffuse photoelectric proximity sensor with background suppression. It provides stable detection of objects regardless of colour or surface quality within a sensing range of 30 mm to 300 mm. The visible red LED (650 nm) and precise light spot simplify alignment and setup. Enclosed in a compact 11 × 31 × 20 mm rectangular plastic (ABS) housing rated IP67, it is intended for high‑speed, space‑constrained industrial automation tasks.

Applications:

• High‑speed part presence detection on conveyors and sorting systems

• Object positioning and counting on automated assembly lines

• Packaging machinery for small part monitoring and gap detection

• Material handling and logistics automation

• General factory automation requiring reliable background‑independent detection

Core Specifications:

• Functional principle: Photoelectric proximity sensor, diffuse with background suppression

• Sensing range max.: 30 mm … 300 mm (object with 90 % remission) 

• Recommended sensing range: 40 mm … 300 mm 

• Light source: LED, visible red light (λ = 650 nm wavelength) 

• Light spot size (distance): Ø 20 mm (300 mm) 

• Supply voltage: 10 V DC … 30 V DC 

• Switching output: PNP 

• Switching mode: Light/dark switching (selectable via selector) 

• Output current Imax.: ≤ 100 mA 

• Response time: ≤ 0.5 ms 

• Switching frequency: 1,000 Hz 

• Adjustment: Potentiometer, 4 turns 

• Connection type: Male connector M8, 4‑pin 

• Enclosure rating: IP67 

Advanced Specifications:

• Housing material: Plastic, ABS 

• Optics material: Plastic, PMMA 

• Current consumption (no‑load): ≤ 30 mA 

• Signal voltage PNP HIGH/LOW: approx. VS – 1.8 V / 0 V 

• Circuit protection: A (VS reverse‑polarity), B (inputs/output reverse‑polarity), D (output overcurrent and short‑circuit) 

• Dimensions (W × H × D): 11 mm × 31 mm × 20 mm 

• Weight: approx. 10 g 

• Ambient operating temperature: –25 °C … +55 °C 

• Storage temperature: –40 °C … +70 °C 

• UL File No.: NRKH.E181493

• Items supplied: Stainless steel mounting bracket (1.4301/304) BEF‑W100‑A 

• RoHS compliant

System Integration:

• Belongs to SICK W8 series of miniature photoelectric sensors.

• Mounts via two M3 through‑holes with standard 1‑inch (25.4 mm) spacing using the supplied BEF‑W100‑A bracket.

• The background suppression functionality detects only objects within the set sensing range, ignoring background elements for consistent switching behaviour.

• The M8 4‑pin male connector mates with standard industrial M8 female cables.

• Select light‑on or dark‑on mode via the L/D selector; adjust sensing threshold using the 4‑turn potentiometer.

• Yellow output LED indicates switching status; green LED indicates power.

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

Related Products:

• WTB8‑N2231 – NPN output version (same sensing range and housing)

• WTB8‑P1231 – 2 m cable version instead of M8 connector

• WTB8L‑P2231 – Laser version for extended performance

• YF8U14‑020VB3XLEAX – M8 straight female connector cable, 4‑pin, 2 m, PVC