PAC CHECK™ PAC CHECK series headspace analyzers offer fast, accurate shelf-life testing of finished packages, including modified atmosphere packaging (MAP) and vacuum-packed products. Such testing is necessary because the atmosphere in a package cannot be strictly and indefinitely controlled, only modified. These easy to use systems are used in production, QC, and R&D applications to measure CO2 and O2 concentration levels either manually or automatically, testing requires only small samples. The same analyzer can be used for both flexible and rigid packages. These instruments are certified traceable to N.I.S.T. (National Institute of Standards and Technology) as an added feature for the quality conscious producer. Typical applications for PAC CHECK systems include: snack foods, bakery goods, meats & cheeses, pharmaceutical packaging, modified atmosphere packaging, coffee, juice, carbonated beverages, and produce.