These liquids are often glycol/glycerine based mixed with distilled water a=
s far as I know. I've worked on many types of nightclub type fog generators=
, but never over concerned myself with what the liquid was, except that whe=
n I had to test I did that outside & keep away from the 'smoke' until dispe=
rsed. Its supposed to be non toxic, but why take a chance.

The thing is that every such unit I've seen so far needs a heater through w=
hich the liquid is pumped (using a 10 Bar Ulka type vibrator pump similar t=
o those used in some coffee machines) to vaporize it. The heaters take a si=
gnificant time to reach operating temperature. I'd imagine this is impracti=
cable for a security system, so it would be interesting to see if the outpu=
t is instant when triggered.

Joe

-----Original Message-----
From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf Of=
 RussellMc
Sent: 03 June 2011 08:04
To: Microcontroller discussion list - Public.
Subject: [TECH] Smoke Cloak - intruder deterrence system

Real world vapour ware.
Looks like fun

Security fog generators

             http://www.smokecloak.co.nz/?gclid=3DCOLU1oOUmakCFQEQbAod02cAt=
Q

What IS the "dense harmless vapour*"?




             Russell

* Not vapor - this is NZ.
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