Through-beam sensors from Balluff are used for reliable object detection, regardless of surface, color, material - and even in the case of strong gloss. They consist of separate transmitter and receiver units that are aligned with one another. If an object interrupts the light beam, this causes a change in the output signal in the receiver. Absolutely reliable. Special features = Washdown, Series = 21M, Dimensions = 15.4 x 51.1 x 42.7 mm, Interface = IO-Link 1.1 Normally open (NO) Normally closed (NC), Operating principle = Optoelectronic sensor, Optical operating principle = One-way light barrier (receiver), Light type = Red light, Range = 0...20 m, Connection = Plug connector, M12x1 plug, 4-pin, Housing material = Zinc, die-cast, powder-coated zinc die-cast, Active surface, material = PMMA, Operating voltage Ub = 10...30 VDC, Approval/Conformity = CE, UKCA, cULus, WEEE, Ecolab