CROWN COPYRIGHT / HEALTH & SAFETY LABORATORY / SCIENCE PHOTO LIBRARY CROWN COPYRIGHT / HEALTH & SAFETY LABORATORY / SCIENCE PHOTO LIBRARY
Gas-pressurised triggered water barrier being tested in the 1970s. Such systems were developed for use to extinguish fires. The flames of a fire trigger a charge that disrupts a diaphragm barrier, leading to a release of water under pressure. This water extinguishes the fire. This research was carried out by what is today the UK's Health and Safety Laboratory (HSL). Photographed in the 1970s.
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