Air Pollutant

Reference Method

Principle of Detection

Proposed Analytical Range

CH₄

EPA 18

GC/FID

0 to 25 ppm

EPA 3C

GC/TCD

0 to 10 ppm

CO

EPA 10

NDIR-Gas Filter Correlation

0 to 25 ppm

CO₂

EPA 3A

NDIR

0% to 10%

NO_X

EPA 20

Chemiluminescence

0 to 25 ppm