These mixtures are used as control atmospheres for the growth of aerobic and anaerobic biological cultures.
Anerobic cultures thrive when deprived of oxygen. These gas mixtures contain less than 10 PPM of oxygen.
Aerobic cultures require oxygen to survive. COA not included.
| Anaerobic Mixtures | Cylinder Size | Contents cu.ft. | Connection |
| 0-5% Hydrogen Balance Carbon Dioxide 5-10% Carbon Dioxide 5-10% Hydrogen Balance Nitrogen 0.5% Carbon Dioxide Balance Nitrogen |
300 200 300 200 300 200 |
100 81 276 207 301 226 |
350 350 350 350 580 580 |
| Aerobic Mixtures | Cylinder Size | Contents cu.ft. | Connection |
| 5-10% Carbon Dioxide Balance Oxygen 0.5-10%% Carbon Dioxide Balance Air |
300 200 300 200 |
293 220 285 214 |
296 296 580 580 |