THE FDS SERIES IONIZATION SMOKE DETECTOR OFFER A HIGH STANDARD PERFORMANCE AND QUICKLY RESPOND TO VISIBLE AND INVISIBLE COMBUSTION PRODUCTS GENERATED BY FIRE IN ITS INCIPIENT STAGE. THE OPERATING PRINCIPLE OF THESE DETECTORS ARE FOLLOWS. BASICALLY, THE IONIZATION SMOKE DETECTOR CONSISTS OF AN OPEN SAMPLING CHAMBER, A SEALED REFERENCE CHAMBER AND ELECTRONIC CIRCUIT FOR ALARM EVALUATION.
