In this paper we report on how to increase the selectivity of gas sensors by using fluoropolymer membranes. The mass transport of polar and non-polar gases through a polymer membrane matrix was studied by systematic selection of polymers with different degrees of fluorination. as well as polymers whose monomers have ether groups (-O-) in addition to fluorine groups (-F). For the study. https://macorners.shop/product-category/matching-ugly-sweaters/