Main Features Series R81K Dimensions 15 x 48.9 x 31 mm Interface PNP Normally Open (NO) Contact Normally Closed (NC) Contact Operating Principle Optoelectronic Sensor Optical Operating Principle Optical Detector Light Type LED Red Light Spot Size 18 x 18 mm to 300 mm Range 5...300 mm Connection Connector, M12x1 - Male Connector, 4-Pin Housing Material ABS PMMA Sensing Face Material PMMA Operating Voltage Ub 10...30 VDC Approvals/Compliance CE cULus UKCA WEEE Supply Mounting Bracket