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WTB12-3P1131

The SICK WTB12-3P1131 is a compact photoelectric proximity sensor from the W12-3 series. Featuring background suppression technology, it delivers reliable object detection based on contrast with the background—regardless of the object's color or reflectivity.

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Key Features
Functional Principle: Background-suppression photoelectric proximity sensor
Sensing Range: From 20 mm to 350 mm (measured on standard 90 % reflectance white target)
Light Source: Visible red LED (wavelength 640 nm), with about 6 mm light spot at 200 mm distance
Adjustment: 5-turn potentiometer for precise range tuning
Indicators:
Green LED: Power on
Yellow LED: Detection status
Electrical & Performance Specs
Supply Voltage: 10–30 V DC (with < 5 Vp-p ripple
Current Consumption: Approximately 45 mA (no load)
Output Type: PNP, light/dark switching mode, complementary output
Electrical Ratings:
Signal Voltage (High/Low): > UB – 2.5 V / approx. 0 V
Max. Output Current: ≤ 100 mA
Response Time: ≤ 330 µs (with resistive load)
Switching Frequency: Up to 1,500 Hz (light/dark ratio 1:1)
Protection:
Reverse-polarity protection (A)
Interference suppression (C)
Output overcurrent and short-circuit protection (D)
Mechanical & Environmental Specifications
Housing: Rectangular, robust metal body; front screen made of plastic (PMMA)
Dimensions: 15.6 × 48.5 × 42 mm (W × H × D)
Weight: Approximately 200 g
Connection: 2 m long, 4-wire PVC cable—conductor cross-section 0.25 mm²
Ingress Protection: Rated IP66, IP67, and IP69K, suitable for harsh environments
Operating Temperature: –40 °C to +60 °C; Storage: –40 °C to +75 °C
Additional Certifications & Durability
MTTFd: 599 years (mean time to dangerous failure)
Safety & Regulatory Approvals: Includes EU, UK, ACMA conformity, cULus certification, China-RoHS, ECOLAB certificate, and photobiological safety (DIN EN 62471)