The WF50-40B410 is a high-speed fork-style photoelectric sensor featuring a 50 mm slot width and 42 mm depth. It detects objects as small as 0.2 mm using infrared LEDs, with selectable PNP or NPN output and light/dark switching via intuitive plus/minus buttons. Its slim aluminum housing offers robust IP65 protection and fast switching performance, making it ideal for demanding industrial automation tasks.