Spark 3
Spark 3 : A moving ember. The overwhelming majority of applications involving the detection of Class A and Class D combustibles with radiant energy-sensing detectors involve the transport of particulate solid materials through pneumatic conveyor ducts or mechanical conveyors. It is common in the industries that include such hazards to refer to a moving piece of burning material as a "spark" and to systems for the detection of such fires as "spark detection systems"
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