An IRGAS gas analyzer is an integrated, application-specific system combining a high-sensitivity FTIR spectrometer, a matched gas cell, and dedicated analytical and control software. A general-purpose FTIR spectrometer provides core spectroscopic capabilities, but gas-stream analysis also requires suitable sampling hardware, a gas cell, and an analytical method. The main difference lies in the level of integration and application-specific configuration, not in the underlying spectroscopy.
What “Standard FTIR” Usually Means
Fourier Transform Infrared Spectroscopy, or FTIR analysis, measures how infrared light is absorbed by a gas, liquid, or solid sample, and that absorption pattern forms a molecular fingerprint used to identify the sample’s composition. A general-purpose FTIR spectrometer provides the core measurement capability. For a more detailed explanation of the underlying process, see CIC Photonics’ article on how FTIR analysis works. Its suitability for industrial gas analysis depends on the gas cell, sampling hardware, software, calibration method, and operating conditions used with it. CIC Photonics’ IRGAS systems bring these elements together in a configuration designed for the intended gas-analysis application.
What Integrated Real-Time Gas Analysis Solutions Adds
IRGAS stands for Integrated Real-Time Gas Analysis Solutions, and it was originally developed as the first analytical instrument for parts-per-billion detection of electronic specialty gas impurities. Rather than shipping a spectrometer alone, CIC Photonics’ IRGAS gas analyzer system pairs an enhanced FTIR spectrometer, such as the MB3000 with its 50,000:1 signal-to-noise ratio and 485 to 8,500 cm⁻¹ spectral range, with a gas cell selected for the specific gas species and sampling conditions, and with Specialty Gas Analysis Solution (SPGAS) software that handles calibration and data display.
The gas cell itself is a meaningful part of the difference. CIC Photonics has refined its cell engineering for over 25 years, using protected gold-coated mirrors that deliver more than 98.5 percent reflectivity in the mid-infrared region and a laminar-flow plenum design that reaches 90 percent gas exchange in two volume changes rather than the typical three. A standard FTIR spectrometer, sold without this cell engineering, will not carry these sampling advantages on its own.
Comparing the Two Approaches
- Scope: a general-purpose FTIR spectrometer provides the core measurement instrument, while a turnkey IRGAS configuration combines the spectrometer, gas cell, and application-specific software.
- Sensitivity: IRGAS systems were built specifically for parts-per-billion detection of specialty gas impurities, beyond what a general-purpose FTIR setup is typically configured for.
- Sampling hardware: IRGAS includes a gas cell matched to the application, in materials ranging from 316L stainless steel to Hastelloy C22 or C276, with pathlengths and heating or cryogenic options selected for the process; a standard FTIR system requires this to be sourced and integrated separately.
- Software: IRGAS ships with SPGAS software that uses PNNL-based calibration data; a standard FTIR spectrometer typically requires separate analytical software.
- Compatibility: CIC Photonics states that its solutions are compatible with FTIR spectrometers across the market. The company should still evaluate the existing instrument, gas cell, software, and performance requirements before confirming whether integration is practical.
Which One Fits Your Application
A standard FTIR spectrometer can be the right starting point for lab-based, single-sample testing where a technician manages calibration and sampling manually. An IRGAS system is a better fit where continuous, application-specific monitoring is needed, such as semiconductor moisture detection, solar photovoltaic process gas analysis, combustion efficiency testing, or specialty gas composition monitoring for research and government programs. If you are unsure which category your project falls into, the safest starting point is to describe the gas species and sampling environment and let CIC Photonics confirm which approach actually fits.
Talk Through the Right Configuration
To talk through your configuration, contact CIC Photonics, send an email to request@cicp.com, or call the team at (505) 343-9500. You can also visit the CIC Photonics facility at 6310 Edith Blvd Ste. A NE, Albuquerque, New Mexico 87107, or leave a review on Google to share your experience.