The chromaTHC is an automated isothermal industrial gas chromatograph dedicated to the analysis of volatile organic compounds in air (indoor, outdoor, combustion), industrial hygiene, pure gas like N2/CO2/O2.
The chromaTHC delivers CH₄ and Non-Methane Total Hydro Carbon (NMTHC) monitoring and analysis of Methane and Non-Methane Hydrocarbons by flame ionization detection (ppm level analysis)
- As a fully automatic instrument, the CHROMATHC allows un-attended operation after commissioning 24/24.
- The injection is made in an isothermal oven at a standard temperature 80°C.
- The separation between CH4 and (C2H6 for UHC) and NMTHC is achieved using a column with back flush.
Unlike other similar analyzers, there is no interference with oxygen.
To eliminate issues with flame fluctuation, a valve regulates carrier gas (hydrogen or Nitrogen or air).
The retention time drift is less than 0.3 %.
- The instrument has a flame ionization detector (FID) heated at 150°C with auto ignition.
VISTACHROM ® software :
Chromatotec developed software system allows:
- Remote monitoring
- Full traceability through archiving of results and QC
- Set up and control of threshold alarms
- Export of data MODBUS / MGS1 / 4-20mA /0-10V
Technical
| Detection Limit: | 20 ppb for methane and < 20 ppb on NMTHC eqC3
chroma THC-1 ppb: LDL < 1 ppb for TVOC
% with internal loop valve (XXXVALVEHC) |
| Detection Range: | 20 to 5000 ppb (ampli 3)
0.2 to 200 ppm (ampli 2)
0 to 5 % with smaller sampling loop
1 to 2000 ppb (ampli 3) |
| Relative Standard Deviation: | < 0.3 % over 48 h (RT)
< 2 % over 48 h (Span Concentration) |
| Results: | Embedded computer WindowsR based with LCD display
128 GB of hardware storage on SSD memory
Ethernet, remote control
MODBUS RTU / MGS1 or JBUS |
| Cycle time: | 2 minutes for 0-3 ppm in ambiant air (standard)
3 to 5 minutes or more for higher concentrations or process application (option)
chromaTHC-1 ppb: 10 min |
| Gas supply: | H2 (FID and carrier gas): 30 mL/min (Inlet 2 bars; 1/16’’ double ferrule)
Air (FID): 180 mL/min (inlet 3 bars; 1/8’’ double ferrule)
Sample inlet (vacuum pump in option) 1/4’’ double ferrule 80 mL/min at ambient pressure
Pneumatic valve 90 mL/min valve actuation |
| Sample volume: | Injection loop with volume designed according applications |
