Rockwell Automation 42JT-P2LAT1-P4 Photoelectric Sensor, 42JT, Polarized Retroreflective, Visible Red LED, Teachable Light Operate - Dark Operate, Autodetect PNP or NPN and IO- Link Output, Push Button and Remote Teach Sensitivity, 6 m Sensing Range, 4 pin DC Pico (M8) Integral QD