EMGA-921 Hydrogen Analyzer from HORIBA

The EMGA-921 Hydrogen analyzer from HORIBA​ is a "New flagship model” for H analyzer. This user friendly product is a 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, catalyst, new materials, etc.

The EMGA-921 Hydrogen analyzer is a new generation model optimized to meet the requirements of users. The hydrogen is measured as H2 by a thermal conductivity detector.


The key features of the EMGA-921 Hydrogen analyzer are as follows:

Super High Performance

High Precision Measurement and Wide Range

  • Precision H: σn-1≦0.04 ppm or RSD≦0.5% for reference gas
  • Range: Hydrogen: 0 - 0.25%
  JSS GS-1c SS-5-27 Gas
1.77 µg/g 7.39 µg/g - -
1 1.711 7.364 2.227 6.971
2 1.686 7.367 2.227 6.979
3 1.703 7.439 2.221 6.973
4 1.729 7.418 2.22 6.981
5 1.719 7.436 2.226 6.967
Average value 1.71 7.405 2.224 6.974
Standard deviation 0.016 0.037 0.003 0.006


The EMGA-921 meets the requirements of standard methods for analysis of steel ceramics, titanium etc...

  • ASTM E1447
  • JIS Z2614, JIS H0696, JIS H1664, JIS H1619

User-Friendly Software

Measurement Window

Simple software allows facilitated operations.

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

It is possible to register sample weight automatically in the measurement window. Saving results in a data table provides easy management.

HORIBA Originality-Maintenance Navigator

Maintenance counter informs users when to replace consumables  to maintain high accuracy. The maintenance procedures are described step by step by the Maintenance Navigator.  No specific experience or technical knowledge is required from the operator to perform all required maintenance tasks.

Fully Supported Accessories Give Simple Operation

The  EMGA-921 can be equipped with accessories for increased automation, leading to improved throughput and facilitated operation.

Automation System 1 – Automated Crucible Loader

Precise catch and positioning of crucibles by rotary engine (Maximum stock:100 pcs normal and long type crucibles)

Automation System 2 - Auto Cleaner with Crucible Waste Box

Two rotating brushes clean the lower and upper electrode after each measurement. The vacuum cleaner eliminates dusts and preventing contamination.

Auto cleaner disposes the crucible after every single measurement in the crucible waste box where approx.200 pcs crucibles can be disposed.

Simple Operation

The EMGA-921 with two automation systems offers a simple operation process by just placing the sample and pushing the start button after filling conditions and sample name and also provides a clean measurement environment.

Improved Mechanism

Easy Replacement of Electrode and Reagent Tubes

Pressing the button on the maintenance navigator automatically stops the gas flow. The maintenance navigator then guides the operator to perform change of electrode and/or reagent tube.

The electrode can be changed without removing the upper electrode block and tubes. The operator only needs to remove the consumable part (Electrode tip).

EMGA-921 Electrode

EMGA-921 Electrode

EMGA-921 Reagent tubes

EMGA-921 Reagent tubes

Hopper Mechanism - Sample Window

The Hopper mechanism was enhanced for effortless cleaning and it can be cleaned without removing the air cylinder.

Dual Sample/Flux Introduction Mechanism - HORIBA Original Patent

This mechanism enables sample and flux to drop independently allowing outgassing of the flux at low temperature before the analysis. The benefits include optimization of flux outgassing temperature, control of crucible corrosion, and prevention of flux spatter. As a result, optimization of flux efficiency without consequences on blank contributes to obtaining measurements with high accuracy.

  1. The crucible is out gassed by a high current
  2. The flux is introduced into the crucible and it is also out gassed
  3. The sample drop into the crucible for analysis

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