g2201 isotope ANALYZER

G2201 Isotope Analyzer

The Picarro G2201-isotope analyzer combines capabilities of two Picarro δ13C carbon isotope instruments for CO2 and CH4 into a single instrument. Now it’s easy and fast to capture the insights that only stable isotope ratios offer. Researchers can follow carbon as it moves from source to sink with a single instrument. The dual-purpose analyzer brings simplicity and speed to research. Its small size and robustness make it easy to transport to the field, where immediate results allow researchers to change course on-the-fly and achieve optimal results from limited-time field campaigns.

  • Only field-deployable analyzer for simultaneous high-precision δ13C measurements in CO2 and CH4
  • Three measurement modes: CO2 only, CH4 only, and CO2 and CH4 combined
  • Excellent precision at a fraction of IRMS operating cost—less calibration, less maintenance, no consumables

The analyzer operates in one of three modes: 1) CO2 only, 2) CH4 only, and 3) CO2 and CH4 combined. In the combined mode, the measurement of CO2 and CH4 are interleaved every few seconds to produce a sampling rate that is faster than the gas turn-over time in the cavity. When the analyzer is in CO2 only mode or CH4 only mode, the precision improves, because more time is devoted to one molecule. In all modes, the analyzer precisely measures CO2, H2O and CH4 concentrations, with fewer calibration events than other spectral absorption-based instruments. The G2201-analyzer can be paired with a variety of peripherals to extend and expand functionality.


  CO2 CH4 CO2–CH4
Dynamic Range Isotope-only mode Isotope-only mode Simultaneous mode
CO2 Guaranteed Spec Range 380–2,000 ppm 200–2,000 ppm 380–2,000 ppm
CO2 Operational Range 100–4,000 ppm 0–4,000 ppm 100–4,000 ppm
CH4 Guaranteed Spec Range 1.8–500 ppm High Precision mode: 1.8–12 ppm High Precision mode: 1.8–12 ppm
High Dynamic Range mode: 10–1,000 ppm  
  High Dynamic Range mode: 10–500 ppm
CH4 Operational Range 0–1,000 ppm High Precision mode: 1.2–15 ppm
High Dynamic Range mode: 1.8–1,500 ppm
H2O Guaranteed Spec Range 0–2.4%
H2O Operational Range 0–5%
  CO2 CH4 CO2–CH4
General Isotope-only mode Isotope-only mode Simultaneous mode
Measurement Interval »3 sec »5 sec
Ambient Temperature Dependence Guaranteed <±0.06‰/ºC, typical <±0.025‰/ºC
Rise/Fall Time (10–90%/90–10%) Typical »30 sec
Applications Considerations Interference can occur for concentrations of H2O and CO2 well outside of the defined dynamic range, as well as other organics, ammonia, ethane, ethylene, or sulfur containing compounds. Users should verify with prepared lab samples. Please contact us to discuss the experimental conditions. Pressure drops in the instrument’s gas path can draw external air when this system is used in recirculating applications.


·          δ13C

·         Carbon Dioxide (CO2)

·         Methane (CH4)

·         Isotopic Carbon Dioxide (iCO2)

·         Isotopic Methane (iCH4)


·         Atmospheric Science

·         Emission Quantification

·         Agriculture & Soil Science

·         Ecology

·         Food & Beverage

·         Petrochemical