Minerva MF601 Conventional Ionisation Smoke Detector
These detectors react to the visible and invisible fire aerosols (products of combustion) and are therefore capable of detecting the early presence of hot smouldering and flaming fires, such as wood, paper etc.
They are particularly suitable for general applications in all areas and use a dual ionisation chamber in which the air is ionised by a single radioactive source (33k Bq Americium 241). The presence of smoke in the sampling chamber causes a change in the balance voltage, between the two chambers. This is then compared against an alarm level.
These detectors have now been superceded by the 601I, please follow the link for more information.
601I Ion Chamber Smoke Detector
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