There are two main types of smoke alarm tech, says Raman Chagger, principal consultant at BRE, the Building Research Establishment. Ionisation-based systems use a tiny amount of radioactive material to charge, or ionise, particles in the air which flow between two small plates. Should smoke interrupt that flow of charged particles, the alarm goes off.
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Раскрыто решение для участников схемы на 35 миллионов рублей в российском вузеВ Калининграде осудили экс-проректора и экс-ректора БФУ
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Source: Computational Materials Science, Volume 266