Analisador de oxigénio, azoto e hidrogénio ONH5000

ONH5000 Oxygen, Nitrogen and Hydrogen Analyzer is a high-performance analyzer for fast and accurate analysis of oxygen, nitrogen and hydrogen elements. The whole machine adopts modular and integrated design with six independent hardware module units, which is suitable for the determination of oxygen, nitrogen and hydrogen contents in ferrous metals, nonferrous metals, superconducting materials, semiconductor materials, rare earth materials, ceramic materials, refractory materials and other metallic and nonmetallic solid materials.

Princípio

The ONH5000 Oxygen, Nitrogen, and Hydrogen Analyzer utilizes an inert gas-protected pulse furnace for melting and decomposition of samples. It measures oxygen via infrared absorption and nitrogen and hydrogen via thermal conductivity detection. The instrument is capable of simultaneously determining the content of oxygen, nitrogen, and hydrogen, or measuring each element individually as needed.

Equipped with an 8.0 kW pulse electrode furnace under inert gas protection, the ONH5000 achieves temperatures exceeding 3500°C. The furnace features program-controlled temperature ramping, with selectable power or current-controlled heating modes, ensuring complete and controlled sample decomposition. Depending on the target element, either helium or nitrogen is used as the carrier gas.

During high-temperature thermal decomposition:

• Oxygen in the sample reacts with the graphite crucible to form carbon monoxide (CO)
• Nitrogen and hydrogen are released in molecular forms as N₂ and H₂

The carrier gas transports these gases to a conversion furnace, where CO is oxidized to CO₂. The mixed gases then pass through the infrared detection system, where CO₂ is quantified. The remaining gas mixture (containing N₂ and H₂, with CO₂ removed) is routed to the thermal conductivity detector for the measurement of nitrogen and hydrogen.

Both detection systems (IR and TCD) amplify and convert the collected signals via A/D processing. These signals are then sent to the computer system for data analysis, calculating the oxygen, nitrogen, and hydrogen content in the sample with high precision.