Oxygen strongly influence the properties of copper and catalyst which makes a reliable and precise measurement of these elements an important part of the quality control process.
QT-O-3000 Oxygen Analyzer is a new and advanced product. It is used for oxygen to determination in ferrous and non-ferrous metals, rare earth materials, alloy, and some other inorganic.
Working Principle
Pulse heating inert gas fusion method
Working Curve
Working curve for oxygen
Main Analysis Window
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 analyzed by an infrared absorption detector and the Oxygen concentration is calculated. The Nitrogen is analyzed afterwards by a thermal conductivity detector.
The electrode impulse furnace applies a high current up to 1000A to a graphite crucible and heats it to maximum 3000°C. Itself is water cooled to avoid a overheating. The loading mechanism allows the sample introduction into the crucible without interference from Oxygen out of the air.
Detection system
Solid state Infrared detector is used for Oxygen.
Infrared Cells
Two IR cells are installed in the analyzer. The length of each cell can be customized according to the content of samples.
Detector
Solid-state pyroelectric detector made in Germany.
Motor
Synchronous motor made in Swiss.
Source
Anti-oxide, stable IR emitter made in US.
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.
Protecting gas
Infrared emitter and the detector are separated from the ambient by nitrogen, which can improve the stability and the accuracy.
Thermo-conductivity (TCD) detecting unit
Anti-oxide NTC thermistor
Signal processing
Small current control technique is developed to make sure the thermistors can be used without carrier gas.
Reference gas circuit
Low flow control technique is used.
Range |
Oxygen |
Low Oxygen: 0.0001% - 0.5%; High Oxygen: 0.5% - 20% |
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Sensitivity |
Oxygen: 0.01ppm |
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Repeatability |
Oxygen: 1ppm or 1% |
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Sample mass |
1g (Sample mass can be changed according to the content) |
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Analysis time |
about 3 min |
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Carrier gas |
High purity helium for O/N, high purity nitrogen for H |
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Pneumatic gas |
compressed air |
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Structure |
Modular Structure, including analyzer, computer, electronic balance*, printer*, water circulate chillers*. Note: * is optional. |
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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°C |
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Calibration |
1) Fast calibration |
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2) Normal calibration |
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Power |
220VAC 10%, 50/60Hz, current max. 50A (Max.10KW) |
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Size |
Host |
W × h × D: 55cm × 65cm × 65cm |
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Auxiliary machine |
W × h × D: 45cm × 65cm × 65cm |
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Weight |
180kg |
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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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