Rockwell Automation R7KJS-T9MPA1-F4 Kit with Bracket, Photoelectric Sensor, 42JS, Transmitted Beam Receiver, Visible Red LED, Complementary Light - Dark Operate, PNP Output, Adjustable Sensitivity, 10 m Sensing Range, 4-pin DC Micro (M12) on a 150 mm (6 in.) pigtail