Optex REDSCAN Series Manual page 86

Area Masking
⚫ Masking area is available to ignore some area and reduce false alarm.
Area Set
⚫ Learns background of the area.
Detection Mode
⚫ Selectable for customer's application.
DQ (Environmental Disqualification)
⚫ Detects harsh environment, fog, rain, or snow for example.
Environmental Resistance
⚫ Reduces false alarm due to fog or snow.
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