Inlet particulate filters on Picarro instruments should be changed at least every 2-3 years. This tutorial takes users over the steps required to replace and leak check their inlet filter. Filters can be found on the webstore at the links below.

Metal: store.picarro.com/For-Analyzer/Parts/Particulate-filter-kit-all-models-except-HF-NH3.html

Teflon: store.picarro.com/For-Analyzer/G4XXX/Particulate-filter-teflon-for-NH3-HF._3