With SEMA Gases quality is guaranteed. At SEMA Gases we believe that safety comes through accuracy. We offer a wide range of (test) gases applicable for all brands of gas detection equipment. SEMA Gases produces single gases (flammable gases, oxygen, toxic gases) and gas mixtures (2, 3, 4 or 5 gas mixtures) in various cylinder sizes 10 ltr, 34 ltr, 58 ltr or 110 ltr. All our calibration/test gases are made of the highest and purest quality gases. Common gases are ex-stock. Worldwide distribution is possible. Interested in becoming a distributor? Please contact one of our current distributors or us.