Product Name | UHP Helium | HP helium | |
Helium | ≥99.9999 | ≥99.999 | |
Impurity ( ppm) | Water ( H2O ) | ≤0.5 | ≤3 |
Oxygen+Argon ( O2+Ar ) | ≤0.1 | ≤1 | |
Nitrogen ( N2 ) | ≤0.5 | ≤2 | |
Carbon Monoxide ( CO ) | ≤0.1 | ≤0.5 | |
Carbon dioxide ( CO2) | ≤0.1 | ≤0.5 | |
Hydrocarbon ( THC ) | ≤0.1 | ≤0.5 |