ChemFilm 200', for use in all lead acetate tape H2S analyzers.
Manufacturer: Del Mar Scientific, Inc.
ChemFilm® is much more reactive, accurate and durable than any other paper sensing tape ever made. ChemFilm® lead acetate-impregnated sensing tape is a highly evolved innovation of the original tape used in the long-standing, industry standard, ASTM approved method for detecting and measuring Hydrogen Sulfide (H2S) in natural gas