Elite A OMRON 24 Volt Photocell Retro-reflective type - Detecting distance:10 m 33 ft with E39-R1 -12m 40 ft with 3-in dia reflector Supply voltage: 24 to 240 VAC  10% 50/60 Hz;to 240 VDC  10% Power consumption: 13.75 VA max.; 3.75 W max. VDC - Detectable object: Opaque materials, 56mm min Response time (max.): 30 ms -- Sensor; 0.5 to 3Directional angle ; relector: 40 min. Control output: Relay (DPDT) -- NEAM 1, 4, 4X, 12 Indoor, 13