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The Bard 8612-061 Dust Sensor Alarm Board is an OEM control board used in Bard wall-mount units equipped with particulate monitoring to interpret the dust sensor signal and trigger the proper alarm or service indication when airborne particulate levels or sensor status call for attention. This board supports dependable IAQ-related fault reporting and helps keep the unit operating as designed by ensuring dust sensor events are communicated correctly to the system controls. If you are troubleshooting nuisance dust alarms, a non-responsive dust sensor input, or a persistent filter or particulate alert on compatible Bard Fusion-Tec equipment, replacing the Bard 8612-061 with the correct factory part is the safest way to restore proper operation and avoid mismatched aftermarket electronics.