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| 3M Calibration Gas | To order 3M calibration gas, simply find your unit and click on the Add button for the gas next to the instrument you have. If you cannot find your gas detector, please Contact Us and we'll select it for you. |  |
3M 740 4 Gas Detector | 18% Oxygen, 10% LEL Methane, 35ppm Carbon Monoxide, 10ppm Hydrogen Sulfide, balance Nitrogen. 58L - $206.00 |
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