For more information, call Western Safety Products at 206-264-0808 or email sales@westernsafety.com.
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| Tube No. | Gastec Tube Name | Measuring Range | Order Online |
| 1A | Carbon monoxide (Airtec tube) | 5 - 50 ppm | |
| 1D | Carbon monoxide (Dosi tube) | 1.04 - 2000 ppm | |
| 1DL | Carbon monoxide (Dosi tube) | 0.4 - 400 ppm | |
| 1H | Carbon monoxide | 0.1 - 10% | |
| 1HH | Carbon monoxide | 1 - 40% | Order Online |
| 1L | Carbon monoxide | 2.5 - 2000 ppm | Order Online |
| 1LA | Carbon monoxide | 8 - 1000 ppm | Order Online |
| 1LC | Carbon monoxide | 1 - 30 ppm | |
| 1LK | Carbon monoxide | 5 - 600 ppm | Order Online |
| 1LL | Carbon monoxide | 5 - 50 ppm | |
| 1LM | Carbon monoxide | 25 - 2000 ppm | |
| 1M | Carbon monoxide | 0.05 - 4% | |
| 2A | Carbon dioxide (Airtec tube) | 250 - 3000 ppm | |
| 2AG | Carbon dioxide (Airtec tube) | 200 - 3000 ppm | |
| 2D | Carbon dioxide (Dosi tube) | 0.02 - 12% | |
| 2H | Carbon dioxide | 0.5 - 20% | |
| 2HH | Carbon dioxide | 2.5 - 40% | |
| 2HT | Carbon dioxide (Injection tube) | 10 - 100% | |
| 2L | Carbon dioxide | 0.13 - 6% | Order Online |
| 2LC | Carbon dioxide | 100 - 4000 ppm | |
| 2LL | Carbon dioxide | 300 - 5000 ppm | Order Online |
| 3D | Ammonia (Dosi tube) | 2.5 - 1000 ppm | |
| 3DL | Ammonia (Dosi tube) | 0.1 - 10 ppm | |
| 3H | Ammonia | 0.2 - 32% | Order Online |
| 3HM | Ammonia | 0.05 - 3.52% | Order Online |
| 3L | Ammonia | 0.5 - 78 ppm | Order Online |
| 3LA | Ammonia | 2.5 - 200 ppm | Order Online |
| 3M | Ammonia | 10 - 1000 ppm | Order Online |
| 3S | Ammonia (Continuous sampling tube) | 0.5 - 5 ppm | |
| 4D | Hydrogen sulfide (Dosi tube) | 0.2 - 200 ppm | |
| 4H | Hydrogen sulfide | 10 - 4000 ppm | Order Online |
| 4HH | Hydrogen sulfide | 0.1 - 40% | |
| 4HM | Hydrogne sulfide | 25 - 1600 ppm | Order Online |
| 4HP | Hydrogen sulfide | 0.25 - 2% | |
| 4HT | Hydrogen sulfide | 1 - 40% | |
| 4L | Hydrogen sulfide | 1 - 240 ppm | Order Online |
| 4LB | Hydrogen sulfide | 0.5 - 12 ppm | Order Online |
| 4LK | Hydrogen sulfide | 1 - 40 ppm | Order Online |
| 4LL | Hydrogen sulfide | 0.25 - 120 ppm | Order Online |
| 4LT | Hydrogen sulfide | 0.1 - 4 ppm | Order Online |
| 4M | Hydrogen sulfide | 12.5 - 500 ppm | Order Online |
| 4S | Hydrogen sulfide (Continuous sampling tube) | 10 - 200 ppb | |
| 5D | Sulfur dioxide (Dosi tube) | 0.2 - 100 ppm | |
| 5DH | Sulfur dioxide (Dosi tube) | 10 - 600 ppm | Order Online |
| 5H | Sulfur dioxide | 0.05 - 8% | |
| 5L | Sulfur dioxide | 1.25 - 200 ppm | Order Online |
| 5LA | Sulfur dioxide | 0.5 - 60 ppm | Order Online |
| 5LB | Sulfur dioxide | 0.05 - 10 ppm | Order Online |
| 5LC | Sulfur dioxide | 0.1 - 25 ppm | |
| 5M | Sulfur dioxide | 20 - 3600 ppm | Order Online |
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