The OPB885CZ is a wide gap slotted (transmissive) optical switch. Current through the LED provides a light signal directed across the open gap of the switch toward the phototransistor. The collector current of the phototransistor is dependent on the amount of light striking it. When a opaque target passes through the gap, the amount of collector current is lowered significantly as shown in the graph.
 
                 
                 
                 
 
 
 
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                                 South Africa
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