NO₂/NO Sample Gas Converter

The NO₂/NO sample gas converters series PSG NC are used for continuous extractive gas analysis. They serve primarily for conversion of NO2 to NO for determination of NO_x as a sum of NO and NO₂. This enables the use of a NO-analyzer for measurement of the total nitrogen oxide concentration in burning processes like e.g. power plants or waste incinerations.

The centerpiece of PSG NC and PSG NCB is an oven within the easy to change molybdenum filled catalyst cartridge. The precise electronic temperature control to only 225°C in combination with the long-lasting catalyst cartridge achieves high conversion ratios even at high flow rates. Unique on the market is the catalyst reaction without any CO emission! The PSG NCB converter is additionally equipped with a 3/2-way solenoid valve downstream the catalyst cartridge to offer a bypass for test and calibration reasons.

Almost the total NO2 amount of the sample gas is converted to NO with help of the molybdenum catalyst at an operating temperature of only 225°C. The low operating temperature prevents unwanted side-reactions. The change of the catalyst cartridge can be done very quick and simple via a thermally decoupled handle within short time. The bypass valve of the PSG NCB can be activated on the front panel to check e.g. the status of the catalyst cartridge with NO2 test gas or for calibration via converter without influence of the catalyst.