The HOA2006 consists of an infrared emitting diode facing an
Optoschmitt detector encased in a black thermoplastic housing. The
photodetector consists of a photodiode, amplifier, voltage regulator,
schmitt trigger, and an NPN output transistor with a 10 K ohm (nominal)
pull-up resistor. The buffer logic provides a high output when the optical
path is clear, and a low output when the path is blocked. Both emitter
and detector have 1,52 mm (0.060 in.) x 1,52 mm (0.060 in.) vertical
apertures.
The sensor housing contains IR (Infrared) transmissive optical
windows. This arrangement provides excellent protection against visible
ambient light while eliminating aperture openings which could be
clogged by airborne contaminants.
Housing material is polycarbonate. Housings are soluble in
chlorinated hydrocarbons and ketones. Recommended cleaning agents
are methanol and isopropanol.