This is a Solo A5 smoke detector test gas cannister 250ml (flammable) suitable for testing all types of smoke detectors installed into buildings. It is an "every day" tester, and it is also flammable. It can be used as a hand-held test gas cannister.
The way it works is like this: the cannister releases smoke particles to the detector under test, replicating the conditions of smoke alarm from a fire in a safe and clean manner.
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