The sample, filled in a graphite crucible, will be fused in the electrode furnace. Nitrogen and hydrogen gases are being released from the sample into the carrier gas and the oxygen is reacting with the carbon of the graphite crucible to CO. The CO is oxidised to CO2 afterwards.
The analytical gas will then be led to the thermal conductivity cell for the determination of nitrogen and hydrogen and afterwards to the infrared cell for the determination of oxygen. From the received data of the detectors the PC is calculating the concentrations of oxygen, nitrogen and hydrogen.
The infrared system is designed for a precise operation with low maintenance. The constantly active infrared emitter is providing a low-noise signal. It is possible to extend the analyser with up to 2 independent detector units for a wide analytical range. The design of the cuvette allows easy cleaning. A temperature controlled environment ensures a long-time stability of the analyser´s performance.