The basis of electrochemical cell gas sensor technology is presented in the context of electrochemical cell portable analyzers for emissions testing of NOx and CO. This paper presents a modified test method approach and QA/QC criteria that supplement the project goal of assessing existing portable analyzer test methods and protocols for appropriate QA/QC requirements. The goal of a modified method is to minimize testing costs while ensuring data quality. The modified method leverages the inherent linearity of electrochemical cell technology, based on fundamental scientific principles, to employ...
The basis of electrochemical cell gas sensor technology is presented in the context of electrochemical cell portable analyzers for emissions testing of NOx and CO. This paper presents a modified test method approach and QA/QC criteria that supplement the project goal of assessing existing portable analyzer test methods and protocols for appropriate QA/QC requirements. The goal of a modified method is to minimize testing costs while ensuring data quality. The modified method leverages the inherent linearity of electrochemical cell technology, based on fundamental scientific principles, to employ single point calibration and order of magnitude span gases. Special considerations are included for “near zero” emissions testing (e.g., concentrations that are single digit parts per million by volume). Further demonstration and validation of a modified method through laboratory and field testing is recommended.