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