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10 to 30 VDC. Kit Contains: E3N2-50L4-US and E3N2-50DB4-US, Screw Kits. PNP. . . Omron E3N2-50B44-US Photoelectric Sensor Switch, 10 to 30 VDC. Omron. Omron Corporation. E3N2-50B44-US.