Early-warning smoke detection vs a standard smoke alarm explained

Diagram of layered security around an artwork: perimeter, building shell, interior zone, display or store, and the object

Three weeks back I was in a private gallery off Chapel Street in Prahran, checking a client’s storage room before a revaluation. Standard smoke alarm on the ceiling, ten years old, battery half flat. The owner told me it was “basically the same thing” as the aspirating system I’d quoted for the vault next door. […]