Minimum Ignition Energy Apparatus  ‚MIKE‘

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:

  •     • EN 13821: Determination of minimum ignition energy of dust/air mixtures
  •     • EN ISO/IEC 80079-20-2: Explosive atmospheres. Material characteristics. Combustible dusts test methods
  •     • ASTM E2019: Standard Test Method for Minimum Ignition Energy of a Dust Cloud in Air

Test condition \ Apparatus MIKE3 MIKE4
  • Atmospheric
  • Increased temperature
  • Reduced oxygen

Operation

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.

Measurement Range

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

NEW Software MIKE 4.0
for MIKE3-CAN and MIKE4-CAN

Example 1: MZE vs temperature (parameter = oxygen content)


Example 2: MZE vs oxygen content (parameter = temperature)


Download, Updates

Software for Microsoft-Windows 7…11

Note: In the laboratory, the software must be suitable for the equipment.
In the office, we recommend the new MIKE 4.0 software, as this can read all older files.