Minimum Ignition Energy Testing

The Minimum Ignition Energy (MIE) value is used to assess the likelihood of ignition during processing and handling. It helps to define explosion prevention methods.

• MIE < 100 mJ indicates a potential for ignition from static discharges from personnel.
• MIE < 25 mJ indicates a potential for ignition from static discharges during bulking of powders.
• MIE < 30 mJ, resistivity testing and charge relaxation testing is typically required.

Instrument

MIKE3 Apparatus, manufactured by Kühner AG of Switzerland

Applicable Standard

ASTM E 2019, Standard Test Method for Minimum Ignition Energy of a Dust Cloud in Air.

This test method determines the minimum ignition energy of a dust cloud in air by a high voltage spark.

Sample Results

Sample Requirements

Approximately 100 g of material is required.

Sample Preparation

A note on particle size and moisture level for testing. ASTM recommends that dust samples tested be made up of at least 95 % minus 200 mesh (75 micron) size particles and in the dry state. However, as-received testing of samples is allowed. The decision on sample preparation should be based on how the data is to be used. If you are unsure which sample size/dryness level is appropriate for your application, call us at 1-844-ioKinetic to discuss.