MInimum Ignition Energy (MIE)

About MInimum Ignition Energy (MIE)

The MInimum Ignition Energy (MIE) test is conducted to determine the lowest spark energy that will ignite a powder when dispersed in air, as a dust cloud. A purely capacitive generated spark is used for assessment of electrostatic discharges (brush, spark, transitional / propagating brush discharges) incendivity. An inductive generated spark is selected for mechanical (friction, impact and grinding) or electrical (wire short, electrical contact) spark incendivity analysis.
Working through a range of powder concentrations, the material is dispersed into a 1.2L litre glass vessel using, dry compressed air. These momentarily suspended dust clouds are then exposed to sparks of known energy and duration. The energy is lowered, the powder concentration and time delay varied until the ‘MIE’ is established.

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