Compressed Air Air is a colorless, odorless, nonflammable gas that Northern Illinois businesses can get from Weldstar. The calibration and monitoring requirements of today’s world require precise and accurate baselines. The air we breathe, while containing about 21% oxygen in nitrogen, is made up of a number of different components that may vary by location, climate and immediate environment. Often times the concentrations of these varying components are the subject of the measurement. In many cases, just filtering ambient air can get rid of most of the particulate contamination but does not consistently provide a stable “zero” baseline.PurityPlus Air, Zero Air and Ultra Zero Air are what you should select for baseline calibration. These gases aren’t specialty filtered air, but rather are blends of 21% extremely high purity oxygen in the equivalent purity nitrogen. Based off the measuring requirements, total impurities can be as low as one part per million, with specific impurity analysis in the 100 part per billion level, or lower.Weldstar produces PurityPlus Air that is used in or as a calibration gas for environmental, automobile and diesel engine emissions monitoring, industrial hygiene monitors for flammability, toxicity and explosivity, as well as trace impurity analyzers that monitor compounds that may provide longer term health risks. And PurityPlus Air is also used as a balance gas for many specialty gas mixtures to establish a second point of calibration in addition to the zero level provided by PurityPlus Air itself.If you are looking for someone to supply specialty air gases in Northern Illinois then you should contact Weldstar - they are backed by a national network of labs to ensure high purity standards but provide customer service and support in your community. Give them a call today at 855-998-4875 or contact them through their online form.