Airtec tubes are a convenient and simple system for testing gas cylinders, compressed breathing air and air lines. Industrial operations often produce, or are performed in the presence of harmful airborne contaminants. When self-contained breathing apparatus or other devices are used for respiratory protection, the quality of the breathing air requires special attention. Contaminants entering the compressor or contaminants generated by the compressor or cylinder can be harmful to the worker and the respiratory equipment.
| Chemical to measure | Measurement Range (ppm) | Tube No. |
| Carbon dioxide | 200-3,000 | 2AG |
| Carbon dioxide | 250-3,000 | 2A |
| Carbon monoxide | 5-50 | 1A |
| Nitrogen oxides | 0.02-2 | 11A |
| Oil mist | 0.3-1.5mg/m3 | 109A |
| Oil mist | 0.2-5mg/m3 | 109AD |
| Water vapour | 150-3,000mg/m3 | 6Ag |
| Water vapour | 30-80mg/m3 | 6A |
| Water vapour | 500-5,000 | 6AH |
