This Eaton 1251E-6547 photoelectric sensor detector has operating range of up to 500'. It operates in thru-beam mode and is intended for use with a photoelectric sensor source (not included). The detector has a 4-pin Euro QD connection and operates on 10-40VDC input voltage. This photoelectric sensor detector is Underwriters Laboratories Listed (UL) and Canadian Standards Association (CSA) certified for quality assurance and is suitable for use in detecting the presence of an object at a distance.Eaton manufactures electrical, hydraulic, and mechanical power equipment, including the Moeller brand, and was founded in 1911 and is headquartered in Dublin, Ireland.