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The FID 22 m NMHC (mobile variant in a portable case) and FID 22 NMHC (rack variant) analyser is used for continuous monitoring of the content of hydrocarbons (THC)/ Total Organic Carbon (TOC), Methane (CH4) and Non-Methane Hydrocarbons (NMHC) in gases from industrial plants (emissions) or environments (immissions).
The sample gas is extracted at the measuring point and passed through the analyser (extractive measurement).
A flame ionization detector (FID) is used to measure the hydrocarbons (THC). A second sample stream is fed with sample gas via a catalyst and the methane concentration is calculated (CH4). The NMHC value is calculated from these two concentration values.