| Particle diameter (µm): | Setting Velocity (m/s): | Setting Velocity (mm/hr) |
| 0.05 | 3.85E-07 | 1.39 |
| 0.06 | 4.75E-07 | 1.71 |
| 0.08 | 6.69E-07 | 2.41 |
| 0.1 | 8.82E-07 | 3.18 |
| 0.15 | 1.50E-06 | 5.40 |
| 0.2 | 2.26E-06 | 8.14 |
| Typical Concept particle | ||
| 0.3 | 4.21E-06 | 15.16 |
| 0.4 | 6.76E-06 | 24.34 |
| 0.5 | 9.91E-06 | 35.68 |
| 0.6 | 1.37E-05 | 49.32 |
| 0.8 | 2.30E-05 | 82.80 |
| 1 | 3.48E-05 | 125.28 |
| 1.5 | 7.47E-05 | 268.92 |
| 2 | 1.30E-04 | 468.00 |
| 3 | 2.85E-04 | 1026.00 |
| 4 | 5.00E-04 | 1800.00 |
| 5 | 7.76E-04 | 2793.60 |
| Typical competitor particle size | ||
| 6 | 1.11E-03 | 3996.00 |
| 8 | 1.96E-03 | 7056.00 |
| 10 | 3.06E-03 | 11016.00 |
| 15 | 6.84E-03 | 24624.00 |
| 20 | 1.21E-02 | 43560.00 |
| 30 | 2.72E-02 | 97920.00 |
The terminal settling velocity of an aerosol or "artificial smoke" particle increases rapidly with particle size. The settling velocity is proportional to the square of the particle diameter, although sub micron particles, such as those produced by Concept systems require the use of slip correction factors.
Calculated for standard density spheres at 293 K [20° C] and 101 kPa (1 atm).
"Aerosol Technology", William C. Hinds, Wiley-Interscience, 1999
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> view all"We have always found that one of the most effective ways to recreate the sort of conditions caused by a fire, either on a ship or off-shore structure, is by adding safe, artificial smoke. Cadets sometimes think they can remember escape routes but when they are confronted with almost no visibility due to the thickness of the smoke, they realise just how disoriented you can become. The Academy has used Colt's for years now and we have always been more than happy with the way they perform and the service we receive from Concept Smoke Systems!"