Product DescriptionThe TESTO 0133 0010 is a replacement internal filter designed for use with TESTO combustion analyzer instruments. The internal filter protects sensitive electrochemical sensors from particulates, condensate, and contaminants present in flue gas samples, helping maintain accurate readings and extend sensor service life. This is a maintenance-grade consumable component installed by HVAC technicians and combustion analysts as part of routine instrument upkeep. Replacing the internal filter on schedule is essential for preserving measurement integrity in combustion efficiency testing applications.This internal filter is compatible with TESTO 330, 335, 342, and 346 series portable combustion and flue gas analyzers. These instruments are commonly used in residential and commercial combustion testing of gas-fired and oil-fired heating equipment, including boilers, furnaces, and water heaters. The filter is a direct OEM replacement component intended to restore the analyzer to proper operating condition during scheduled maintenance intervals.Key FeaturesOEM replacement internal filter for TESTO 330, 335, 342, and 346 combustion analyzersProtects electrochemical sensors from particulate contamination in flue gas samplesHelps maintain measurement accuracy over the service life of the instrumentConsumable maintenance component for routine analyzer upkeepDirect-fit replacement requiring no modificationCompatibilityCompatible with TESTO 330, 335, 342, and 346 series combustion and flue gas measuring instruments.Installation NotesInternal filter replacement is typically performed by a qualified HVAC technician or combustion analyst during routine instrument servicing. Power down the analyzer and allow it to complete any shutdown purge cycle before opening the instrument housing. Follow the manufacturer service documentation for filter access and replacement procedure. Dispose of used filters in accordance with local regulations, as they may contain residual combustion byproducts.Technical SpecificationsApplication: Internal filter for combustion and flue gas analyzersCompatible Instruments: TESTO 330, 335, 342, 346Standard InformationBrand: TESTOManufacturer Part Number: 0133 0010