Oxygen, nitrogen and hydrogen strongly influence the properties of metals (like steel, titanium, copper) which makes a reliable and precise measurement of these elements an important part of the quality control process.
QT-ONH-3000 Oxygen/Nitrogen/Hydrogen Analyzer is a new and advanced product. It is used for oxygen, nitrogen and hydrogen determination in ferrous and non-ferrous metals, rare earth materials, alloy, and some other inorganic
Pulse heating inert gas fusion method
A graphite crucible is placed on the holder and the impulse furnace is closed by the pneumatic system. The sample of typically 1g is dropped into the loading mechanism after weighing. The outgassing phase starts the analysis cycle to clean the furnace from Oxygen and Nitrogen out of the air. The sample loading mechanism release the sample into the now cleaned crucible. The oxygen content of the sample react with the Carbon from the graphite crucible to CO and the Nitrogen content to elemental N2 gas at temperatures of about 2200°C. Both gases were transported by the Helium carrier gas to the oxidation furnace where Copper Oxide converts the CO to CO2. This CO2 concentration is analysed by an infrared absorption detector and the Oxygen concentration is calculated. The Nitrogen is analysed afterwards by a thermal conductivity detector.
Model |
QT-ONH-3000 |
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Testing Range |
O |
Low Oxygen: 0.0001% - 0.5%; High Oxygen: 0.5% - 20% |
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N |
Low Nitrogen: 0.0001% - 0.5%; High Nitrogen: 0.5% - 50% |
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H |
Low Hydrogen: 0.1ppm-50ppm; High Hydrogen: 20ppm-1000ppm |
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Sensitivity |
O, N, H |
0.01ppm |
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Repeatability |
O, N |
1ppm or 1% |
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H |
0.2ppm or 2% |
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Sample Mass |
1g |
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Analysis Time |
Approx. 3 min |
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Carrier Gas |
O, N |
High purity helium |
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H |
High purity nitrogen |
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Pneumatic Gas |
Nitrogen or compressed air |
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Detection system |
O |
Solid state Infrared detector |
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N, H |
Thermo-conductivity detector |
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Infrared Cells |
2 IR cells are installed in the analyzer. The length of each cell can be customized according to the content of samples |
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Motor |
Synchronous Motor |
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Source |
Anti-oxide, stable IR emitter |
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Temperature control |
Keep constant temperature in the whole infrared unit to make sure the temperature of detected gas to be stable and the results to be accurate |
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Protecting Gas |
Infrared emitter and the detector are separated from the ambient by nitrogen, which can improve the stability and the accuracy |
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Thermo-Conductivity (TCD) Detecting Unit |
Anti-oxide NTC thermistor |
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Signal Processing |
Small current control technique is developed to make sure the thermistors can be used without carrier gas |
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Reference Gas Circuit |
Low flow control technique is used |
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Gas flow control |
High sensitive and accurate electric flow control technique based on the low pressure difference is applied, and Anti-Overshoot System is applied |
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Pulse Heating Electrode Furnace |
Power: Max.7.5KVA, Temperature: Max.3000℃ |
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Calibration |
1. Fast calibration |
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2. Normal calibration |
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Power Supply |
220VAC 10%, 50/60Hz, current max. 50A (Max.10KW) |
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Typical Data |
Content: O: 88ppm: N: 32ppm: H5.8ppm |
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Sample No. |
O content |
N content |
H content |
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1 |
0.00878 |
0.00315 |
0.000591 |
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2 |
0.00882 |
0.00319 |
0.000577 |
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3 |
0.00865 |
0.00321 |
0.000592 |
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4 |
0.00870 |
0.00316 |
0.000580 |
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5 |
0.00900 |
0.00312 |
0.000558 |
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