* Characteristics: The optical transmitting and receiving principle, emits modulated light, receiving the reflected light of the object and to distinguish between different colors according to the intensity of the received light signal, or determining the presence or absence of an object.* Having automated patch SMT technology, overcurrent, overload, short circuit protection, wrong polarity protection.* Material is a metal housing, the housing is a precision casting (die casting machine 150 tons), it has good heat dissipation, electromagnetic shielding and sealing.* Having bright and dark pass through function, and having an output indicator.* Sensitivity (sensitivity) adjustment of a plurality of turns, a single-turn potentiometer two sizes, any user can choose.* Output: NPN (standard) or PNP Description