What is a gas purity certificate?

How can I verify the purity of gas from my nitrogen generator?

July 8, 2022

Pneumatech's nitrogen generators are used in multiple applications in the food and beverage industry, laser cutting equipments, electronics and much more. The purity levels in each of these applications varies and every product range has to be tested to determine its' purity levels and performance resulting in documented purity certificates. But how can I verify the purity of gas from my nitrogen generator?

Every Pneumatech PSA Nitrogen Generator is equipped with Zirconia Oxygen Sensor which provides real time information of the purity of the gas produced. The consumer always have an insight at his office or in his compressor room on the purity level which is being produced by the Pneumatech's gas generator thanks to advanced controller, Zirconia sensor. In addition, Pneumatech provides purity certificates for the PSA Nitrogen range, tested and certified by a third party which guarantees performance complying to the below standards.
  • 2008/84/EC grade 99.0% N2 – Food Safety – (Purity criteria on food additives other than colours and sweeteners (August 27th, 2008)
  • EU pharmacopoeia 01/2008 12470 M grade 99.5% N2
  • USP-NF33 (7727-37-9) – United States Pharmacopoeia – 01/12/2015
Purity certificates show analytical data collected during testing phases of nitrogen generators operating at different purity levels. For example, our PPNG oxygen generators are tested at 97%, 99%, 99.5% and 99.999% purity levels to determine their performance at creating these different purities. During testing, the amounts of different gases are tested for their presence, such as oxygen, carbon monoxide, carbon dioxide, nitrogen oxide/dioxide, methane, water and of course pure nitrogen. The appearance and odor of the resulting nitrogen is also tested and the concentrations along with a "fail" or "pass" will accompany each test.

Why are purity certificates necessary?

Every application that requires the use of nitrogen gas needs the nitrogen at a specific purity level for optimal performance.

For some examples: laser cutting metal typically uses >99,9% Nitrogen, metal heat treatment typically uses 99.5% purity, food packaging ranges from 99.5% to 99.9% and wine-making uses anywhere from 99.5% to 99,999% purity during various stages of the wine-making process. While these percentage differences may seem small, 0.001% makes a big difference in the process and Nitrogen purity levels and performance. Every application will also need specific pressure requirements, flow levels and PDP as well.

Purity certificates are often presented during job bidding or used for verification that a unit can perform to certain specs before being installed in a facility.

Have a question about purity levels or want to see the purity certificate for your nitrogen generator? Contact us today.

PSA Nitrogen Generators Product Gas Generators Membrane Nitrogen Generators