The Omron E3Z-B61 0.5M Photoelectric Sensor offers Retro-reflective without M.S.R. function for clear, plastic bottles, 80 to 500 mm Sensing distance, NPN Output, Pre Wired Cable, 0.5M Length, Red LED (660 nm) Light source, 12 to 24 VDC Power supply voltage, Light-ON/Dark-ON mode. Manufactured by Omron under the Omron Photoelectric Sensors category, this model belongs to the Omron E3Z Series.