Oxygen/Nitrogen/Hydrogen Analyzer



EMGA-930 O/N/H analyzer: It's a "New flagship model” for O/N/H analyzers and user friendly product.

This is a simultaneous oxygen, nitrogen & hydrogen elemental analyzer with high accuracy and repeatability suiting to cutting-edge technology's R&D as well as quality control in the market of steel, new materials, catalyst and so on. This is a new generation model optimized to fit to user's requests.

The oxygen is measured as carbon monoxide and carbon dioxide by two non-dispersive infrared detectors, the nitrogen by a thermal conductivity detector and the hydrogen with non dispersive Infra Red detector as H2O.

Principle and Gas flow diagram

The sample is placed in a graphite crucible and the crucible is maintained between the upper and the lower electrode of the impulse furnace.  A high current power passes through the crucible to create a high temperature. 

The oxide in the sample reacts with the graphite crucible, and is extracted as carbon monoxide (CO), and carried together with the carrier gas. The extracted gas is directly analysed after the dust filter. According to the oxygen concentration, it is determined by CO or CO2 after pass throw oxidizer (Copper Oxide) with a non dispersive Infra-Red analyser (NDIR).

The Hydrogen is determined with a non dispersive Infra Red analyser as H2O after H2 passes through the oxidizer (Copper Oxide).

The Nitrogen in the sample is extracted as nitrogen gas (N2) and its concentration is determined by a thermal conductivity detector (TCD).


Segment: Scientific
Division: Elemental Analysis
Base product
Manufacturing Company: HORIBA Ltd.

Super High Performance

Wide range and high accuracy measurement

*Range: Oxygen: 0-5%, Nitrogen: 0-3%, Hydrogen: 0-0.25%
*Accuracy: σn-1≦0.3ppm or CV≦1.0% for STD sample
                   σn-1≦0.02ppm or CV≦0.5% for Reference gas
*Accuracy H: σn-1≦0.04ppm or RSD≦2.0% for Reference gas

Double detectors of oxygen (CO and CO2), long type cell and optimized design of TCD provide wide range measurements.

Optimization of the signal processing reduces by half the electrical noise compared to conventional model.


EMGA fulfils requirements of the standard method for analysis of steel titanium, ceramics etc…

*ISO10720, ISO17053
*JIS G1228
*ASTM E1019, ASTM E1569, ASTM E1409…

User-friendly Software

Measurement Window

Simple software allows easy handling.

Extracted gas signals are displayed in real time numerically and also as curves together with temperature level. Graphs are saved automatically.

In the measurement window, sample weight can be registered automatically. Results are saved in a data table for easy management.

HORIBA originality-Maintenance navigator

Maintenance counter informs users at the timing of consumables replacement to keep high accuracy means.
And as navigator describes the easy to understand procedure for the replacing parts, operator can do maintenance works with absolutely no experience and technical knowledge.


EMGA-930: Oxygen/Nitrogen/Hydrogen analyzer

Oxygen: Non Dispersive Infrared detector
Nitrogen: Thermal Conductivity detector(TCD)
Hydrogen: Non dispersive Infrared detector (as H2O)

Measurement range*:
Oxygen: 0-5%, Nitrogen: 0-3%, Hydrogen: 0-0.25%
*Up to 100% wt is possible by decreasing the sample weight.

Sample weight: 1.0 ± 0.1g

Sensitivity(Minimum reading): Oxygen/Nitrogen/Hydrogen: 0.001 ppm.

σn-1≦0.02 ppm or RSD≦0.5% whichever is larger (Reference gas)
σn-1≦0.3 ppm or RSD≦1.0%  whichever is larger (Standard sample)
σn-1≦0.04 ppm or RSD≦2% whichever is larger (Reference gas)
** Based on the sample weight 1.0 ± 0.1g and with automation functions described below

1) Measurement result: LCD or printout
2) Alarm message: LCD or printout
3) Flow sheet: LCD

Power of furnace
Inert gas fusion in impulse furnace
Enable to set the generating power 0 – 8.0 kw

Sample introduction: Dual sample/flux introduction mechanism

Automation functions: Auto cleaner, Crucible loader

Integration conditions:
Preset time integration
Integration up to reach comparator level
Preset time integration or integration up to reach comparator level, whichever is shorter

Sample ID: Enter up to 20 one-byte characters


  1. One point or multi point calibration (Reference gas or standard samples)
  2. Calibration using previous analysis data
  3. Calibration curve correction function


  1. Display of real time extraction curve
  2. Analysis interruption
  3. Self diagnosis and alarm display
  4. Analysis of extraction curve (Superposition, difference etc analysis)
  5. Out put (RC-232C or TCP/IP)

Dimensions: 750mm(H)×785mm(D)×653mm(W)
Sample introduction is positioned at 650mm from table.

Weight: 230kg
On carrying, it is divided in two units (Under 140kg/unit)

Computer: PC model operating OS Windows® XP(SP2) and beyond

Main unit: AC200/220/230/240V ± 10%
Auto cleaner: AC100V (Step-down transformer)
Frequency: 50/60 ± 1Hz

Electric power consumption
Main unit:12kVA (MAX)
Auto cleaner: 1.5kVA (MAX)

Ground resistance: Less than 10Ω

Installation condition
Operation temperature: 5-40°C
Performance temperature: 5-35°C
Humidity: Maximal relative humidity 80%RH between 5-31℃, linearly decrease down to 50%RH between 31-40℃
Vibration: Duplex amplitude 20micron and less than 0.098m/S2 accelerations at frequency band

Required gas
He carrier gas: Purity greater than 99.995%, Pressure 0.35MPa
Stainless steel pipe(O.D.3mm) and suitable connecter fitting within 3m of unit
Dry air or N2 as operating gas: Pressure 0.45MPa
Nylon pipe (O.D.6mm) and suitable connecter fitting within 5m of unit

Cooling mechanism: Radiator unit (Separation type)

Electronic balance (Option)
Enable connection with electronic balance with 1-0.01mg minimum display

Optional automatic voltage regulator (AVR)
Weight: 130kg

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EMGA-930 catalog
Size 1.4 MB


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