The OPB810W51Z is a panel/chassis remote-mount Wide Gap Slotted Optical Switch with phototransistor output. It offers 24-inch 26AWG wire interconnect. The transmissive photo interrupter housing is made from an opaque grade of injection-molded plastic that minimizes the assembly sensitivity to visible and near-infrared ambient radiation. Discrete shell, which is exposed on parallel faces inside the device throat, is made of opaque plastic with aperture openings.