Sensor smoke of the type of application has decay

摘要

P the invention relates to a smoke detector to decrease. / p & & p & the detector comprises a light receiver 51 generating pulses vary according to the quantity of light picked up, a correction circuit comprising a memory element 55 and two comparators 39, 40, such that the voltage stored in memory element may be reduced or increased, a detection circuit comprising a third comparator 41, which triggers an alarm circuit when the difference in level between the aforementioned pulses and the voltage across the terminals of the memory element exceeds a predetermined threshold. The present invention applies in particular to the detection of a fire to slow combustion / p