@prefix cpm: . @prefix dc: . @prefix dcat: . @prefix dce: . @prefix dct: . @prefix grg: . @prefix iop: . @prefix ns0: . @prefix ns1: . @prefix owl: . @prefix pav: . @prefix prov: . @prefix puv: . @prefix qudt: . @prefix rdf: . @prefix rdfs: . @prefix reg: . @prefix semapv: . @prefix skos: . @prefix sssom: . @prefix void: . rdf:type skos:Concept ; dce:identifier "SDN:L22::TOOL0085" ; dc:date "2017-04-03 10:55:05.0" ; dc:identifier "SDN:L22::TOOL0085" ; pav:authoredOn "2017-04-03 10:55:05.0" ; pav:hasCurrentVersion ; pav:hasVersion , , ; pav:version "4" ; void:inDataset ; owl:deprecated "false" ; owl:versionInfo "4" ; skos:altLabel "LI-COR 7500 IR gas analyser" , "LI-COR 7500 IR gas analyser"@en ; skos:broader , ; skos:definition "A non-dispersive infrared gas analyser that measures carbon dioxide and water vapour concentrations in the atmosphere. The power received from the infrared source is measured at three wavelengths: one at a wavelength that is absorbed by carbon dioxide, another at a wavelength that is absorbed by water, and the third at a non-absorbing reference wavelength. The absorbance of each gas is calculated and converted to molar fraction using density, pressure and temperature data."@en ; skos:inScheme ; skos:notation "SDN:L22::TOOL0085" ; skos:note "accepted"@en ; skos:prefLabel "LI-COR 7500 infrared gas analyser"@en ; skos:related .