DESCRIPTION
The H21L_ and H22L_ series of transmissive photointerrupters are single channel switches consisting of a Gallium Arsenide infrared emitting diode coupled to a high speed integrated circuit detector. The output incorporates a Schmitt trigger which provides hysteresis for noise immunity and pulse shaping. The gap in the plastic housing provides a means of interrupting the signal with an opaque material, switching the output from an 'ON' into an 'OFF' state.

FEATURES
Built in Schmitt trigger circuit
Open collector output
High sensitivity
3mm gap between LED and detector
1mm aperture over LED and detector