Fog machine systems
The fog machine security systems from Concept Smoke produce artificial fog without the use of expensive pyrotechnic chemicals. The fog or smoke machine effect is produced via steel heat exchangers.Artificial smoke is produced by heating a chemical above its boiling point within a heat exchanger. The chemical is then vaporised, and it is when the vapour exits the heat exchanger and mixes with the relatively colder atmosphere that rapid condensation of the vapour takes place, resulting in a visible smoke (or technically fog).
It is important that the vaporisation of the chemical within the heat exchanger is complete, otherwise the production of a 'wet' smoke, or a smoke with a very large particle size will result.
Conversely, it is important that the heat exchanger through which the chemical is passed is not operating at too high a temperature, otherwise unpleasant and potentially hazardous pyrolysis products will be formed.
Depending on the type of chemical being vapourised, and the nature of that chemical it may be necessary to use an inert propellant gas as a “carrier” for the chemical as it is heated within the heat exchanger.
Concept's machined range of heat exchangers produce a smoke or fog effect
with a particle size an order of magnitude less than conventional smoke
systems, giving significant benefits in terms of smoke concentrations
required to achieve obscuration targets, health and safety, flammability
and settling velocities of the resulting fog.