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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"Our specialist archaeology team and contractors have carefully excavated numerous sites and have shown care and respect throughout this work."
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Продажи коммерческих автомобилей в России рухнули«Автостат»: Продажи коммерческих автомобилей в РФ в 2025 году упали на 37,5 %