SICK WT12-N4371 Photoelectric Proximity Sensor

The SICK WT12-N4371 Photoelectric Proximity Sensor is a compact, rectangular sensor that uses a visible red LED light source to detect objects at close range. As part of SICK's WT12 family, it combines a robust housing with a potentiometer-adjusted sensitivity control and a DC power supply that typically operates from 10 to 30 V, with outputs available in NPN or PNP configurations depending on the specific model. The standard WT12 form factor measures 15 mm wide, 49 mm high, and 41.5 mm deep, making it easy to integrate in tight spaces. For variants in the WT12 family, sensing ranges up to 250 mm are commonly specified (e.g., WT12-2P430) and the light source remains visible red LED, enabling straightforward status indication. Some WT12 models support foreground or background suppression, affecting how targets are detected relative to their background, and several configurations offer either NPN or PNP outputs to match different control architectures. This makes the WT12-N4371 suitable for short-range presence/absence detection on automation lines, packaging, and other compact sensing tasks where reliable red-light photoelectric sensing is advantageous.