The Thermo Scientific IRIS 5500 Mid-IR Laser-Based CH4 Analyzer uses state-of-the-art mid-infrared laser absorption spectroscopy to simultaneously measure methane (CH4) and water vapor concentrations with high precision and accuracy. Continuous measurement of methane gas and water vapor allow for the calculation of the methane dry-mole fraction at sub-ppb levels.
The IRIS 5500 analyzer features a unique Difference Frequency Generation (DFG) laser technology which effectively leverages commodity telecom laser sources with a non-linear frequency conversion crystal to access the mid-infrared spectral region. This unique and robust use of direct absorption spectroscopy within a small absorption cell is relatively insensitive to contamination of the optical surfaces.
The laser incorporated within IRIS 5500 analyzer is approximately 100 times narrower in frequency than the intrinsic absorption line-width. The signal sweeps continuously through the associated lines at a repetition rate of 500 Hz. The minimal passes within the cell reduce the risk for mirror contamination and simplifies maintenance requirements.
Coming soon are IRIS monitors for CO2, CO and N2O
