OMRON E3F2-DS10B4-N Photoelectric Sensor, 4 In, PNP. More details: Photoelectric Sensor, Shape Tubular, Sensing Method Wide Beam Diffuse-Reflective, Circuit Type PNP, Operation Mode Selectable Light or Dark On, Max. Sensing Distance 4 In., Power Requirement 10 to 30VDC, Max. Load Current 100mA, Response Time 2.5 msec, Length 64.9mm, Diameter 18mm, NEMA Rating 1, 2, 4, IP Rating 67, Body Material ABS, Electrical Connection 2m Pre-Wired Cable, Light Source Infrared LED, Features Output Short Circuit and Power Supply Reverse Polarity Protection