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CH₄ and Non-Methanic Compound Analysis: Analysis: CH₄ and NMHC with THC by calculation
CHROMA THC 5U, with inbuilt computer
Lower Detection Limit:
CH₄: 20 ppb
NMHC: 50 ppb as propane
CH₄ in ambient air: 1800 ppb
Xylene: < 10 ppb
Detection Range:
NMTHC (equivalent CH₄): 20 to 2 000 ppb
CH₄: 20 to 2 000 ppb
THC = CH₄ + NMTHC
Autocalibration: Automatic calibration and span gas
Relative Standard Deviation:
< 0.3 % over 48 h (RT)
< 2 % over 48 h (Span Concentration)
Results:
Data storage for traceability
4-20 mA or 0/10 V output (options)
MODBUS / JBUS or MGS1 communication protocol (option)
Ethernet connectivity for remote access
Cycle Time: Response time: 3, 5, or 7.5 min
Gas Supply:
H₂ (FID and carrier gas): 30 mL/min (Inlet 2 bars; 1/16’’ Swagelok)
Air (FID): 180 mL/min (Inlet 3 bars; 1/8’’ Swagelok)
Sample inlet (vacuum pump optional): 1/4’’ Swagelok, 80 mL/min at ambient pressure
Sample Volume: Injection loop, range specific
Power Supply:
Main: 230 V / 115 V or 50 / 60 Hz
Battery: 24 V (option)
Electrical Consumption: Mean: 150 VA
Dimensions and Weight:
Rack: 19’’ (4U) – for C24000
Height: 180 mm
Width: 482 mm
Depth: 600 mm
Net Weight: 17 kg
