Cov khoom
Electronic helium
| Yam khoom | Cov cuab yeej cuab tam |
| Siab purity helium | |
| Helium Nws purity ( ntim feem) / 10-2≥ | 99.999 ib |
| Neon (Ne) cov ntsiab lus ( ntim feem) / 10-6≤ | 4 |
| Hydrogen (H2) cov ntsiab lus ( ntim feem) / 10-6 ≤ | 1 |
| Cov pa oxygen (O2) cov ntsiab lus ( ntim feem) / 10-6 ≤ | 1 |
| Argon (Ar) cov ntsiab lus (ntim feem) / 10-6 ≤ | |
| Nitrogen (N2) cov ntsiab lus ( ntim feem) / 10-6 ≤ | 2 |
| Cov pa roj carbon monoxide (CO) cov ntsiab lus ( ntim feem) / 10-6≤ | 0.5 |
| Cov pa roj carbon dioxide (CO2) cov ntsiab lus ( ntim feem) / 10-6≤ | 0.5 |
| Methane (CH4) cov ntsiab lus ( ntim feem) / 10-6≤ | 0.5 |
| Dej H2O cov ntsiab lus ( ntim feem) / 10-6≤ | 3 |
| Tag nrho cov ntsiab lus magazine / 10-6≤ | 10 |
Sau koj cov lus ntawm no thiab xa tuaj rau peb
