Oxygen/Nitrogen/Hydrogen Analyzer

Oxygen/Nitrogen/Hydrogen Analyzer

Test Application
Metal Testing
Analytical Instruments
Spectroscopy Instruments

Best Application: Metal Testing

Applications

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

  • (Oxygen): NDIR (Non Dispersive Infrared absorption

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.

 

Features/Advantages

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.

 

Technical Specifications

Range

Oxygen

Low Oxygen: 0.0001% - 0.5%; High Oxygen: 0.5% - 20%

Sensitivity

Oxygen: 0.01ppm

Repeatability

Oxygen: 1ppm or 1%

Sample mass

1g (Sample mass can be changed according to the content)

Analysis time

about 3 min

Carrier gas

High purity helium for O/N, high purity nitrogen for H

Pneumatic gas

compressed air

Structure

Modular Structure, including analyzer, computer, electronic balance*, printer*, water circulate chillers*.

Note: * is optional.

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

Pulse heating electrode furnace

Power: Max.7.5KVA, Temperature: Max.3000°C

Calibration

1) Fast calibration

2) Normal calibration

Power

220VAC 10%, 50/60Hz, current max. 50A (Max.10KW)

Size

Host

W × h × D: 55cm × 65cm × 65cm

Auxiliary machine

W × h × D: 45cm × 65cm × 65cm

Weight

180kg

Typical data: Content: O : 88ppm; N: 32ppm; H5.8ppm

Sample No.

O content

N content

H content

1

0.00878

0.00315

0.000591

2

0.00882

0.00319

0.000577

3

0.00865

0.00321

0.000592

4

0.00870

0.00316

0.000580

5

0.00900

0.00312

0.000558