Maintenance teams planning replacements for WLD16P-257221A0ZZZ frequently review Sick Laser Sensor, Sick Gtb6 P4211 and P&F Photoelectric Sensor to prevent downtime, checking availability and compatibility with existing systems.
Sick WLD16P-257221A0ZZZ Photoelectric Sensor
The Sick WLD16P-257221A0ZZZ Photoelectric Sensor delivers 0.25–14 m sensing using dual-lens retro-reflective detection with 635 nm LED illumination. It provides a point-shaped light spot of 16 mm at 1 m and uses wire/pin adjustment for setup. The sensor includes complementary push-pull PNP/NPN outputs, 500 µs response time, and complete circuit protection. Built with a VISTAL housing and rated IP66, IP67, and IP69, it supports harsh industrial conditions. Explore Sick sensors, view Sick photoelectric sensors, and check the W26/W16 series.
| Brand | Sick |
| Product Type | Photoelectric Sensor |
| Model Number | WLD16P-257221A0ZZZ |
Sick WLD16P-257221A0ZZZ Photoelectric Sensor – Technical Specifications
| Specification | Value |
|---|---|
| Functional principle | Photoelectric retro-reflective sensor |
| Functional principle detail | Dual lens |
| Sensing range min. | 0.25 m |
| Sensing range max. | 14 m |
| Light source | PinPoint LED |
| Type of light | Visible red light |
| Shape of light spot | Point-shaped |
| Light spot size (distance) | Ø 16 mm (1 m) |
| Wave length | 635 nm |
| Adjustment | Wire/pin |
| Indication | LED blue, LED green, LED yellow |
| Supply voltage UB | 10 V DC ... 30 V DC 1) |
| Ripple | ≤ 5 Vpp |
| Usage category | DC-12 (According to EN 60947-5-2), DC-13 (According to EN 60947-5-2) |
| Current consumption, sender & Receiver | ≤ 30 mA, without load. At UB = 24 V |
| Protection class | III |
| Digital output Number | 2 (Complementary) |
| Output type | Push-pull: PNP/NPN |
| Signal voltage PNP HIGH/LOW | Approx. UB-2.5 V / 0 V |
| Signal voltage NPN HIGH/LOW | Approx. UB / < 2.5 V |
| Output current Imax. | ≤ 100 mA |
| Circuit protection outputs | Reverse polarity protected, Overcurrent and short-circuit protected |
| Response time | ≤ 500 µs 2) |
| Repeatability (response time) | 150 µs |
| Switching frequency | 1,000 Hz 3) |
| Housing | Rectangular |
| Dimensions (W x H x D) | 20 mm x 55.7 mm x 42 mm |
| Connection | Male connector M12, 4-pin |
| Housing material | Plastic, VISTAL® |
| Front screen material | Plastic, PMMA |
| Male connector material | Plastic, VISTAL® |
| Maximum tightening torque of the fixing screws | 1.3 Nm |
| Enclosure rating | IP66 (EN 60529), IP67 (EN 60529), IP69 (EN 60529) 1) |
| Ambient operating temperature | –40 °C ... +60 °C |
| Ambient temperature, storage | –40 °C ... +75 °C |
| Weight | Approx. 50 g |
The Sick WLD16P-257221A0ZZZ Photoelectric Sensor offers 0.25–14 m retro-reflective detection, a dual-lens optical system, and a 635 nm PinPoint LED for precise alignment. With complementary push-pull output, LED status indicators, and IP69 protection, it supports demanding automation needs. As part of the W26/W16 series, it is designed for stable performance in industrial environments.
This model is suitable for conveyors, packaging lines, material-flow systems, and assembly machines where long-range retro-reflective sensing is essential. Its robust housing, fast 500 µs response time, and consistent optical behavior help maintain accuracy in dusty, wet, or vibration-heavy applications. The compact design supports flexible mounting and straightforward electrical integration.
The Sick WLD16P-257221A0ZZZ Photoelectric Sensor provides stable long-distance detection with dual-lens optics, a reliable 635 nm LED, and strong environmental protection. Engineers depend on this model for consistent detection, dependable switching, and compatibility with modern automation requirements. Its proven reliability, rugged build, and adaptable output configuration make it suitable for a wide range of industrial systems.
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