Each Bulk tank is analyzed daily to assure that only high purity product is used. Cylinders are painted white for cleanliness and labeled with gas contents for easy visual identification. Permanent batch records are kept on pure gas products and can be provided on request. Valves are shrink wrap sealed to keep out dirt and moisture during storage and transportation. Cylinder labels and valve tags give complete information on contents and analysis of gases.
Certification is provided with each primary or certified standard mix.
Individual records by serial number are stored in a computer database and can be retrieved at any time. Cylinders can be mixed by pressure or by weight where smaller components or greater accuracy is required. The Setra gravimetric fill system, available on both the noflammable and flammable mix manifolds, allows gases to be blended with a sensitivity of 0.2 grams of product. Flammable gas mixtures of up to four components are filled on a dedicated manifold. Cylinders can be blended by pressure or gravimetrically.