The OPTEX KR-Q50NW is a compact retro-reflective photoelectric sensor designed for precision detection and durability in industrial environments. Belonging to the K series, it features a stainless steel–clad rectangular housing constructed from SUS304 with an ABS case and PC lens, ensuring resistance to corrosion and mechanical stress. Operating on a 10 to 30 VDC power supply, it uses a red LED light source and provides a sensing range from 10 mm to 500 mm with a 45 mm beam spot at 500 mm, supporting transparent object detection. The sensor includes a 1-turn potentiometer for easy sensitivity adjustment and is resistant to electrical noise. It offers one NPN output with Light-On/Dark-On selectable modes and a 2-meter cable connection. With an IP67 protection rating and an operating temperature range of -25°C to +55°C, the KR-Q50NW delivers reliable performance in harsh industrial conditions. In North America, Europe, Asia, and worldwide factory automation systems, it could potentially be suitable for transparent object sensing and precise retro-reflective applications.