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Oxygen & Nitrogen & Hydrogen Analyzer

O-3000 / N-3000 / H-3000 / ON-3000 / OH3000 /ONH-3000

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.

DescriptionFeaturesParametersBrochure

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.

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 and Nitrogen out of the air.

Detection system: Solid state Infrared detector is used for Oxygen. Thermo-conductivity detector is used for Nitrogen & Hydrogen.
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.

Analysis range (1.0g sample)
Oxygen: hypoxia: 0.1 ~ 300ppm * hyperoxia: 0.03% ~ 2%*
Nitrogen: low nitrogen: 0.1 ~ 300ppm * high nitrogen: 0.03% ~ 2%*
Hydrogen: low hydrogen: 0.1-50ppm * high hydrogen: 50-1000ppm*
Note:  changing the sample weight can change the measurement range


Analysis accuracy

Oxygen and nitrogen: 1ppm or 1%*
Hydrogen: 0.2ppm or 2%*
Note: the standard deviation or uncertainty of the sample shall prevail.

Sensitivity: 0.01ppm

Analysis time: generally 3 minutes

Sample weighing

generally 1g, which can be changed according to the sample content.


Pulse furnace: current 0 ~ 1500A, power: 7.5kVA, maximum temperature higher than 3000 ℃.

Carrier gas
Oxygen and nitrogen analysis: high purity helium (high nitrogen sample can be replaced by high purity argon)
Hydrogen analysis: high purity nitrogen

Power 

220 VAC ± 10%, 50 ± 1 Hz, maximum current 50 a.


SIZE

Host: W × h × D: 55cm × 65cm × 65cm
Auxiliary machine: W × h × D: 45cm × 65cm × 65cm


Weight 

180kg