The 363SM is a heated pre-filter which is installed close to the sampling point, providing a filtration of hot sample gas before allowing down the heated line to the gas analyser.

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