Designation:D8406−22StandardPracticeforPerformanceEvaluationofAmbientOutdoorAirQualitySensorsandSensor-basedInstrumentsforPortableandFixed-pointMeasurement1ThisstandardisissuedunderthefixeddesignationD8406;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticeestablishesstandardizedtestsfortheper-formanceevaluationofsensor-basedcontinuousinstrumentsforambientoutdoorairqualitymeasurements.Itdescribesbothlaboratoryandfieldteststhatprovideinformationoncandidatesensorrepeatability,sensitivity,linearity,cross-interferences,drift,andcomparabilityagainstreferenceinstruments.1.2Thispracticedoesnotapplytosensorsorinstrumentsthatremotelymeasureatmosphericpollutantsusingopenpath,lidar,orimagingtechnology.1.3Theevaluationprocedurescontainedinthispracticeareforsensorsthataloneorincombinationmeasureoutdoorcriteriapollutantsinambientair:particulatematter(PM2.5andPM10),sulfurdioxide(SO2),ozone(O3),carbonmonoxide(CO),ornitrogendioxide(NO2)atconcentrationsthatarerelevanttopublichealth.1.4TestingistobeperformedbyacompetententityabletodemonstratethatitoperatesinconformitywithinternationallyacceptedtestlaboratoryqualitystandardssuchasISO/IEC17025.1.5Units—ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.7Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarr...
