Smoke Particle Size

Common to this range of smoke generators is our incorporation of precision, machined, specially treated steel heat exchanger blocks, in which the smoke chemical is vaporised.

Conventional smoke generators normally use either cast or platen type aluminium heat exchangers, which, whilst very cost effective to make, generally produce a smoke particle with a mass median diameter (mmd) of 1 - 10 microns.

This compares with a typical particle size of just 0.2 - 0.3 micron mmd for the smoke systems below, be they water or oil based.

The general benefits of producing such a consistent and clearly defined particle distribution are:

• the smaller the particle size of the smoke, (or more accurately fog) the smaller the amount of chemical is required within the atmosphere to achieve any given visibility. This can have a significant effect on running costs for heavy users of artificial smoke (fire brigades etc.)
  
• the less the amount of chemical in the atmosphere, the safer the smoke if measured in terms of relative Occupational Exposure Levels.
  
• the smaller the particle size of the smoke, the lower its settling velocity (the rate at which a particle will fall, due to gravity). A smoke particle of unit density, 0.2 micron in diameter, will fall at 8mm/hr, compared to a 2 micron particle, which falls at 468mm/hr. In essence this means that the smaller the particle of smoke you produce, the less chance there is that deposition of smoke particles will occur.
  

Small particle size = no residue!

	Hand Portable Smoke Machine - hand-portable unit. Can deliver quick dispersing smoke (PS-021) or long lasting (PS-023). Off-power facility on basic models. 240/110v.
	2.2kW High Output Smoke Generator - continuous high output 2.2kW machine with a choice of fluids available for either quick dispersing smoke or persistent. 240/110v.
	Oil Based Smoke Generator - oil-based smoke machines with continuous highly controllable output. The generated smoke can withstand high temperatures, is very persistent and has a very small particle size (no residue) and can easily be ducted. 240/110v.

The Oil Based Smoke Generator in operation