System of precocious detection of smokes for aspiration LaserSense ZLS10 (50m). Equipped with a chamber of analysis for bundle of light laser with adjustable sensibility from 0 ' 003 % up to 25 % osc/m. It incorporates 1 entry of pipeline of ABS/PVC's sampling forming a zone of detection. Gone out by dry contact of general alarm and general breakdown with option of 5 exits for dry contact including the optional card ZLSS-RL4. Manual adjustment / automatic of the sensibility and compensation for dirt. Points of sampling by means of direct drill on the pipeline or by means of capillary pipe.