The Edwards SD-T18 air sampling tube works with the Edwards Super Duct detectors. SuperDuct detectors continually sample air flow in the HVAC duct and initiate an alarm condition whenever smoke detected. An alarm activated when the quantity (percent obscuration) of combustion products in that air sample exceeds the detector’s sensitivity setting.
Air velocity in the duct as low as 100 ft/min. maintains adequate air flow into the sensor smoke chamber through air holes in the air sampling tube; and discharges through the exhaust tube. SuperDuct air sampling tubes installed with the inlet holes facing the airstream. Sampling tubes rotate in 45-degree increments so that air-holes aligned to allow the unit mounted in virtually any angle relative to the airflow.
The sampling tube may be installed from either the duct side of the assembly; or from inside the sensor compartment, as preferred by the installer. Sampling tubes rotate in 45-degree increments so that air-holes align; to allow the unit mounted at virtually any angle relative to the air flow.