Det-Tronics Adds IP66/67 Approval to Existing Ultra-Fast Hydrogen Sulfide Gas Detector; Detector approved for Class I, Div 1 locations including locations that require IP66/67. Detector Electronics Corporation (Det-Tronics), a provider of industrial fire detection, gas detection, and hazard mitigation systems, announces that its Nanotechnology Metal Oxide Semiconductor hydrogen sulfide gas (NTMOS H2S) detector has earned approval for use in locations that require an ingress protection rating of IP66/67, ideal for petrochemical, oil and gas applications (http://ntmos.det-tronics.com).