This compact 3 U high 19” rack enclosure houses both the NOx converter as well as a self contained heated filter and calibration gas selection valve. It is generally used with the Signal Group S4 PULSAR multi-gas analyser or to check converter efficiencies.

Inside the Heated Sample Line: Why Temperature Integrity Matters in Gas Analysis
In the realm of precise gas analysis, particularly within continuous emissions monitoring systems (CEMS) and process control applications, the integrity of the sample from the point of extraction to the analyser is paramount. A critical, yet often underestimated, component in maintaining this integrity is the heated sample line. Failure to