We've recently had a 'Smoke Cloak' fitted in the shop at work (after two robberies where Plasma and LCD TV's were stolen).
It's essentially a smoke machine on steroids :lol:
Do you know how 'night store' electric heaters work?, they store heat in bricks from cheap overnight electricity - the 'smoke cloak' works in the same way, it's full of hot bricks kept at a fairly constant temperature.
When it's triggered the 'smoke' fluid is pumped through the bricks where the heat vapourises it, producing a thick stream of dense smoke. It fills the shop completely in 20-30 seconds, and you can't see your hand in front of your face :lol:
The fluid is similer to that used in disco smoke machines, some kind of vegetable oil, it just produces far greater quatities of smoke :lol:
As a disco smoke machine only has to produce small quantities of smoke, presumably it can do just just with a hot element, no need for all the bricks?. I imagine it needs to be at a specific temperature though?.