High Performance Oxygen, Nitrogen and Hydrogen Analyzer

The high-end analyzer G8 GALILEO is designed for the automatic and precise determination of oxygen, nitrogen and hydrogen in solid materials

The G8 GALILEO ONH is a high-end instrument designed for the rapid and automatic determination of oxygen, nitrogen and hydrogen in solid materials. This analyzer is based on the inert gas fusion (IGF) principle, which involves fusion of the sample material in a graphite crucible at high temperatures. The gas fusion analysis (GFA) principle is also commonly termed a melt extraction (ME) since the total oxygen, nitrogen and hydrogen composition is extracted via sample melting.

When combined with an external, infrared heated furnace, the G8 GALILEO can measure the diffusible hydrogen content in many sample materials, e.g. in welds according to ISO 3690 and AWS4 4.3 as well as in high strength steel.

Coupling a mass spectrometer to the G8 GALILEO analyzer leads to a substantially improved detection limit for the determination of ultra-low diffusible hydrogen concentrations e.g., in high strength steels. This Thermal Desorption Mass Spectrometry (TDMS) technique improves the detection limit by more than one order of magnitude compared to a TCD.

The G8 GALILEO is available with facilities for analyzing all three elements O, N and H, as dual analyzer for two elements and as single-element analyzer for oxygen, nitrogen or hydrogen.


The intuitive analysis software of the G8 GALILEO shows a clear user interface. Different tasks from the user workflow like measurement, input of the analysis parameters, statistical evaluation and calibration of the analyzer are clearly divided into four main views.

Features & Benefits

  • Programmable temperature of the electrode furnace, contact-free optical sensor for temperature measurement and precise control
  • Simple change-over by software from simultaneous oxygen and nitrogen measurement to the determination of hydrogen; external furnace for diffusible hydrogen as an option
  • High stability detection system with NDIR detector for CO and thermal conductivity cell for N2 and H2 with automatic base line control and optimum range selection for all elements
  • Optional automatic furnace cleaning with dust removal, automatic crucible changer and sample loader
  • Optional quadrupole mass spectrometer for diffusible Hydrogen for the measurement of ultra-low hydrogen concentrations and the study and characterization of hydrogen traps in steel

High Performance Oxygen, Nitrogen and Hydrogen Analyzer

Measuring ranges*

  • Oxygen: 0.1 – 250 μg/g and optional 0.02 – 0.5 %
  • Nitrogen: 0.1 μg/g - 0.5 %
  • Hydrogen: 0.01 - 1000 μg/g
  • * Can be extended by adjusting the sample mass

Nominal sample weight

  • 0.5 g

Analysis time*

  • 50 s nominal
  • For diffusible hydrogen up to 60 mins
  • * Depending on sample material, weight and analysis temp.


  • 0.01 μg/g


  • NDIR (CO): ±0.5 μg/g or 1 % RSD**
  • TCD (N2, H2): ±0.05 μg/g or 0.5 % RSD**
  • *Depending on sample weight and concentration

Carrier gas

  • Nitrogen or Argon 99,999%
  • Helium 99.996%
  • 2 bar (~50 psi) pressure

Compressed air

  • 5 bar (~72.5 psi) min. pressure
  • oil and water free

Water cooling

  • approx. 4 l/min (only when heating)
  • (for IR furnace 1 l/min)

Dimensions & weight

  • 800 x 600 x 830mm (wxdxh); approx. 120 kg
  • 31.5 x 23.6 x 32.6 inches; 264.5 lbs.

Power supply

  • Analyzer: 400 VAC, 50/60 Hz, 7 kVA
  • Peripherals: 230 VAC, 50/60 Hz, 800 VA

PC requirements

  • Standard WindowsTM-PC, operating system Windows XP/7*
  • HDD > 200 GB, DVD drive, 2 serial ports RS 232
  • *Windows is a registered trademark of Microsoft Corporation

Optional mass spectrometer for hydrogen

Detection limit

  • 50 – 100 ppb hydrogen at 1 g sample weight
  • With higher sample mass, e.g. 10 g, the detection limit is 10 times lower

m/z range

  • 1 - 100 amu, optimized for mass 2 (hydrogen)


  • With H2 gas via the gas dosing unit G8 GALILEO

Electrical supply

  • 230VAC, 50/60 Hz, 250 VA

Dimensions and weight

  • 630 x 640 x 480 mm (WxDxH), approx. 60 kg
  • 24.8 x 25.2 x 18.9 inches; 132 lbs.

Coming soon.