The Remote Sensor series consists of a wide selection of remote photoelectric sensors manufacturers, which are made to operate in conjunction with a Telco photoelectric professional amplifier. The remote photoelectric sensors consist of a separate professional transmitter and receiver sensor, which are available in a wide range of housings that may be used thru beam or diffuse proximity mode. The series is available with an optional power-on indicator in the receiver sensor and output indicator in the transmitter sensor, for use with any Telco photoelectric amplifier which has the sensor LED drive feature incorporated.