1. Behavior of the Maximum Explosion Pressure of Gas-Air Mixtures in Small Free Volumes Inside Spherical Enclosures

2.  National Metrology Institute  Determination of natural constants  Maintenance of the legal units of the SI  Partner in research and industry

3. Contain gases in designate pathways Avoiding the spread of an explosion to the outside environment

4.  Explosion pressure highest in spherical enclosures  Maximum Pressure Tests for capsules of small volumes very complex  Goal: Determine behavior of maximum explosion pressure in spherical object of smaller and smaller volume

5. 1: Hollow sphere made of polypropylene 2: Ignition electrodes 3: Gas supply capillary 4: Piezo-electric quartz- pressure sensor 5: Polyester resin mantle

9. repository Evacuation tank

10.  2 experimental series:  1: Determination of the maximum explosion pressure for hydrogen-air mixtures (hydrogen concentrations used: 10, 15, 20, 25, 31, 35, 40, 45, 50, 55, and 60%)  2: Determination of the maximum explosion pressure for gas-air mixtures of propane (4.6%), ethylene (8%), and acetylene (14%) Measurement interval: 50ms for both series

11. bar