BPIT, Inc. - Methane / TNMHC Analyzers

Methane / TNMHC Analyzers

By: Synspec

Measurement of Methane and the sum of all other hydrocarbons (TNMHC) in air to know the concentration of the greenhouse gas Methane and of the general load of all other hyrocarbons.

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The greenhouse gas methane is measured by a true GC measurement principle, no interference of other molecules. Applications are: general greenhouse gas monitoring, industrial site or city kerb site monitoring, waste dump sites monitoring, etc.

In the same measurement cycle the sum of all other hydrocarbons is determined. This is a good way to quantify the general air pollution by hydrocarbons. These can come from all kind of sources: nature, industry, traffic, households. The method covers hydrocarbons that will not be seen by standard GC technology, like oxygenated hydrocarbons. 



Synspec produces 4 different versions of Methane/TNMHC analyzers:

  • Synspec Alpha 115 for ambient air measurements, in cities or near industries. 
  • Sysnpec Alpha 116 has a higher range and is suitable for stack measurement up to 1000 ppm.
  • Synspec Delta 116 CEMS for stack measurements and runs according to US EPA 25A.
  • Syntech Spectras GC955 114 analyzer for background measurement  is designed for measuring low concentrations of TNMHC.


Description Specification
Model Alpha 115 Alpha 116 Delta 116 Spectras GC995 114
Cycle Time 3 minutes 3 minutes 3 minutes 15 minutes
Gas Consumption

FID: Zero air, quality 5.0, dry and clean, methane free, 2.5 bar, 250ml /min,

Hydrogen, quality 5.0, 3.5 bar 25 ml/min

No nitrogetn required, but if zero air may contain methane, use of nitrogen as carrier gas is advised.

Detection Limit Methane 0.1 ppm 1 ppm 1 ppm 0.1 ppm
Detection Limit TNMHC 0.05 ppm 1 ppm 1 ppm 10 ppb
Repeatability <1% of FS
Spandrift <2% of FS in 24 hrs
Linearity <1% of FS
Approvals CE approval for EMC conformity: EN 61000-6-2 and EN 61000-6-3