Delta Ray

Isotope Ratio Infrared Spectrometer

The Thermo Scientific™ Delta Ray™ IRIS is able to perform real-time measurements of elemental and isotope composition of CO2 in ambient air. The instrument is designed for field portability. Its modular design, low weight and small footprint enable it to be placed right at the point of research interest. The Delta Ray empowers you to make profound scientific discoveries in a wide variety of research fields like greenhouse gas monitoring, ecology and plant science, volcano monitoring, carbon storage and sequestration.

Precise, Verifiable Isotope Ratio Measurements
The Delta Ray Isotope Ratio Infrared Spectrometer analyzer comes with a universal reference interface (URI) that provides fully automated referencing and calibration for verifiable measurements and long term confidence. Smart referencing adjusts the reference gas concentration to the sample to achieve superior performance. With the optional dilution box, samples with CO2 concentration from 200ppm to 100% can be analyzed.

Isotope Ratios To-Go
No need to fill vials and wait for the analysis back in the laboratory. Instead feature rich data is acquired autonomously 24 hours a day, 7 days a week, with a time resolution as low as one second directly where the sample originates. A quickstart guide gets you going in no time.

Thermo Scientific Delta Ray Laser-based Isotope Ratio Infrared Spectrometers (IRIS) Schematics
Schematic of the Delta Ray


  • δ13C and δ18O in CO2
  • Mid-infrared laser based isotope ratio infrared spectrometer
  • Portable, field deployable
  • Universal Reference Interface – URI
  • Up to 1Hz data
  • 200ppm to 100% CO2 with dilution
  • Global support
Thermo Scientific™ Delta Ray™ IRIS