U.S. federal trademark · Serial No. 86325072
a wireless, battery powered toxic and combustible gas detection system having gas sensors for shale gas drilling rigs that continuously monitor methane (CH4), hydrogen sulfide (H2S), oxygen (O2) and carbon monoxide (CO) levels on the rig and which activates alarms at a monitoring station of the system when any of the CH4, H2S, O2 and CO exceed a predetermined level
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