SICK WTB4-3P2261 Through-Beam Photoelectric Sensor

The SICK WTB4-3P2261 is a compact background-suppression photoelectric sensor from SICK's WTB4 family, designed to reliably detect small parts on fast-moving production lines. It offers a sensing range of 4 to 150 mm and operates on 10 to 30 VDC, with a 4-pin M8 connector for compact installations. The device provides transistor outputs compatible with common controllers and can detect light or dark targets, making it versatile for various surface finishes on conveyors and tooling. Typical applications include part presence verification on feeders, object detection near end-of-line packaging, and inline quality checks, with emphasis on precise short-range sensing in rugged industrial environments. When selecting the exact version, verify wiring, switching mode, and sensing range to ensure compatibility with your control system and target materials.