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Solutions to Eliminate
Measurement Variability
•Procedural solutions -Testing protocols
•EPA Ref. 7E, CTMs 030-034, State,                              Local (i.e SCAQMD 1110.2)
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•Manufacturing solutions -  Analyzer design and manufacturing innovation can help to eliminate measurement variability   
•For NOx – Measure both NO and NO2
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•EC analyzers do not have “NOx converters”, instead they measure actual ppm concentration of NO and NO2.
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