We manufacture efficient, compact, patented air cleaners that offer simple air quality solutions for many laboratory, pharmaceutical, welding, soldering, and manufacturing operations, including laser and 3D printing. We offer several types of filter media, including: HEPA, ULPA, activated carbon, acid gas, and specialty blended filters. Sentry Air Systems is proud to have worked with and supplied air purification systems to government, space aeronautics, education, welding, environmental protection, computer technology, medical, pharmaceutical, construction, entertainment industries. We are a GSA Contract company for DCH, Exhaust Hoods, and PCR. GSA Contract #: GS-07F-0039X Category 66: SCIENTIFIC EQUIPMENT and SERVICES SIN 66-147: Laboratory Fume Hoods, Accessories & Options\ To view options please visit: http://www.gsaelibrary.gsa.gov/ElibMain/contractorInfo.do?contractNumber=GS-07F-0039X&contractorName=SENTRY+AIR+SYSTEMS%2C+INC.&executeQuery=YES