Check the listing for details. Thermo NOx Analyzer 42c MOLY converter Heater. Condition: New – Open box. Listed at 100.00 USD. The Thermo NOx Analyzer 42c MOLY converter Heater is a specialized device designed for gas and combustion analysis. It is used in industrial settings to accurately measure levels of nitrogen oxides (NOx) in flue gas. The MOLY (Method-of-Lines) converter heater is a key component of this analyzer, providing precise temperature control to ensure accurate readings. This tool is essential for monitoring and optimizing combustion processes to reduce harmful emissions and improve overall efficiency in various industrial applications.