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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홧김에 이웃 600가구 태워버린 남성…발단은 아내의 ‘외도’
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No individual or unit has a comprehensive understanding of the overall situation, according to police officers we speak to who were there on the day.