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The SICK WL12 Series (anchored by the widely popular W12-3 generation) is a premier family of photoelectric retroreflective block sensors encased in a heavy-duty metal housing. Featuring a high-end autocollimation optical design, the sensor merges the transmitter and receiver onto a single, shared coaxial axis. This advanced configuration completely eliminates near-range blind spots, allowing the sensor to detect targets reliably from a distance of zero millimetres all the way to its maximum range limit.
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Key Specifications (WL12-3P2431 Standard Baseline)
| Feature | Detail |
|---|---|
| Manufacturer | SICK AG (Germany) — W12-3 Product Family |
| Optical Principle | Coaxial Autocollimation Photoelectric Retroreflective Sensor |
| Sensing Range Max | 0 m to 7 m (Operational distance: 0–5 m on a standard PL80A reflector) |
| Light Beam Source | High-reliability Visible Red LED (640 nm wavelength) |
| Light Spot Size | Ø 100 mm at a physical distance of 3 metres |
| Supply Loop Voltage | 10 to 30 VDC (Includes reverse-polarity loop shielding) |
| Continuous Output Current | Maximum 100 mA |
| Switching Latency / Frequency | 1,500 Hz maximum cycles / ≤ 330 μs signal transit response |
| Casing Construction | Heavy-duty Zinc Die-cast frame with PMMA plastic lens face |
| Sealing / Ingress Rating | Rated to IP66, IP67, and IP69K washdown benchmarks |
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