DESCRIPTION
The HOA1879 series consists of an infrared emitting diode facing an NPN silicon phototransistor encased in a black IR transmissive thermoplastic housing. Detector switching takes place whenever an opaque object passes through the slot between emitter and detector.

FEATURES
• Phototransistor output
• Accurate position sensing
• Choice of detector aperture
• 0.125 in.(3.18 mm) slot width
• Dust protective housing