A device commonly referred to as an electronic natural gas inferential meter that measures natural gas physical quality properties such as thermal conductivity, speed of sound and carbon dioxide content. From these measurements it infers an effective gas mixture comprising four components: methane, propane, nitrogen, and measured carbon dioxide

'carbon':28,48 'common':3 'compon':42 'compris':40 'conduct':23 'content':30 'devic':2 'dioxid':29,49 'effect':37 'electron':8 'four':41 'gas':10,16,38 'infer':35 'inferenti':11 'measur':14,33,47 'meter':12 'methan':43 'mixtur':39 'natur':9,15 'nitrogen':45 'physic':17 'propan':44 'properti':19 'qualiti':18 'refer':4 'sound':26 'speed':24 'thermal':22

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