We have built machines currently in use on aircraft carriers, submarines, oil platforms, and have many US military and industrial complex installations. We build our explosion proof machines by the standards set forth in NFPA 70 article 500, NFPA 496 and UL 1203. Again we use UL to certify that we have met these standards. Our listing number for Control Panel Assemblies for use in Hazardous locations is E316446. We have built numerous explosion proof machines for the military meeting the standards set forth in military specification MIL-E-2036.