1992 - 2016 manufactured by Adolf Kühner AG, Birsfelden, Switzerland
Apparatus for determining the minimum ignition energy of dust/air mixtures.
Minimum ignition energy (MIE) is the lowest energy value that a high-voltage capacitor discharge must apply, to ignite the most ignitable dust/air mixture.
These indices are determined in accordance with international standards in the MIKE laboratory apparatus:
| Test condition \ Apparatus | MIKE3 | MIKE4 |
|---|---|---|
| • Atmospheric | ![]() |
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| • Increased temperature | → | ![]() |
| • Reduced oxygen | → | ![]() |
A modified Hartmann tube made of glass with a volume of 1.2 liter is used as the explosion vessel. The dust dispersion system at the base of the tube is of the "mushroom-shaped" type around which the sample is loosely scattered. A blast of compressed air at 7 bar is used to disperse the dust in the glass cylinder where it is ignited by a spark between two electrodes.
Experiments have shown that dust/air mixtures can easily have MIE values less than 10 mJ. The measurement range of the MIKE 3 has thus been extended to lower energy values. The high-voltage component has been specially designed for the low ignition energies.
Thanks to pneumatically actuated high-voltage switches, the parasitic capacitances have been reduced by an order of magnitude.
Energy range: 1mJ ... 1000mJ
MIKE 3.5 Setup for MIKE3 (1992 - 2019)
MIKE 4.0 Setup for MIKE3/4-CAN (starting 2020)