The Omron E3FB-BP21 Photoelectric Sensor offers Cylindrical axial, Coaxial retro-reflective, 500 mm sensing distance, PNP Output, M12 Connector, Red LED Light source, 10 to 30 VDC Power supply voltage, Light-ON/Dark-ON mode. Manufactured by Omron under the Omron Photoelectric Sensors category, this model belongs to the Omron E3FB Series.