Sometimes even the slightest amount of impurities can cause problems. That is when you will need high purity gases.
The purity in gases is normally expressed by combining the purity unit N with a figure, for instance N46. This means that the percentage value, 99,996 %. that indicates the purity of gas, has four nines (9) and ends with number six (6).
The following table lists the most typical purity classes with total impurity content
Figure N
Total content
Impurities
N26
99,6%
0,4%
N35
99,95%
500 ppm
N45
99,995%
50 ppm
N50
99,999%
10 ppm
N55
99,9995 %
5 ppm
N60
99,9999%
1 ppm
1 % = 10 000 ppm (parts per million,)
The required purity limit is determined by the gas in question as well as a the desired purity level that meets the technological and econimical objectives.
We supply the following UHP gases:
Ammonia, NH3
Argon, Ar
Acetylene, C2H2
Nitrous oxide, N2O
Ethylene, C2H4
Oxygen, O2
Helium, He
Carbon dioxide, CO2
Carbon monoxide, CO
Methane, CH4
Propane, C3H8
Sulfur hexafluoride, SF6
Synthetic air, 20.9 % O2 + N2
Nitrogen, N2
Hydrogen, H2
If you need UHP gas that was not listed above, contact us, and we will obtain it via our international partners.
