Fitting into tight spaces to detect objects as small as 0.03 mm, Model 7400 fiber-optic photo-sensor can be mounted to a DIN rail and comes with a variety of fiber optic cables. Standard features include 1 ms response time, short-circuit and reverse polarity protection along with fine and coarse adjustments. Light On/Dark On modes are selectable by control wire and can be controlled remotely. Supply voltage is 12 to 24 vdc and output voltage is 30 vdc NPN maximum. Operating temperature is 14°F to 140°F.