{HEAD ~ The present invention} generally relates to combustion monitoring systems, and deals more particularly with a device implemented method for monitoring the accumulation of unburned particulates in an exhaust duct employed to exhaust combustion gases from {TAIL ~ combustion system} 
{ HEAD ~ The present invention } generally relates to combustion monitoring systems , and deals more particularly with a device implemented method for monitoring the accumulation of unburned particulates in an exhaust duct employed to exhaust combustion gases from { TAIL ~ combustion system }
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