Our fork light barriers with transmitter and receiver in one housing are already adjusted. This reduces your effort, saves valuable time during commissioning and supports a reliable process. In terms of accuracy, Balluff's fork light barriers are unmatched. Our comprehensive portfolio offers reliable solutions. Also for special applications such as transparency detection, water detection and web edge control. Series=21, dimensions=20 x 26 x 90 mm, fork width=2 mm, interface=PNP normally open/closed (NO/NC) NPN normally open/closed (NO/NC), functional principle=fork light barrier, optical functional principle=through-beam light barrier, beam characteristics=divergent, light type=infrared, light spot size=0.5 x 4 mm light emission, connection=plug connector, M8x1 plug, 4-pin, housing material=aluminum, active surface, material=glass, operating voltage Ub=10...30 VDC, approval/conformity=CEWEEE