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Industrial Scientific 1810-4331 Equivalent Calibration Gas: 40% LEL Methane, 19% Oxygen, 25 ppm Hydrogen Sulfide, Balance Nitrogen

Industrial Scientific 1810-4331 Equivalent Calibration Gas: 40% LEL Methane, 19% Oxygen, 25 ppm Hydrogen Sulfide, Balance Nitrogen

$209.95

Industrial Scientific 1810-7847 Equivalent Calibration Gas: 40% LEL Methane, 19% Oxygen, 100 ppm Carbon Monoxide, Balance Nitrogen

$125.95

Industrial Scientific 1810-9175 Equivalent Calibration Gas: 40% LEL Methane, 18% Oxygen, 100 ppm Carbon Monoxide, Balance Nitrogen

$125.95
Industrial Scientific 1810-9185 Equivalent Calibration Gas: 40% LEL Methane, 18% Oxygen, 100 ppm Carbon Monoxide, 25 ppm Hydrogen Sulfide, 2.5% Carbon Dioxide, Balance Nitrogen

Industrial Scientific 1810-9185 Equivalent Calibration Gas: 40% LEL Methane, 18% Oxygen, 100 ppm Carbon Monoxide, 25 ppm Hydrogen Sulfide, 2.5% Carbon Dioxide, Balance Nitrogen

$209.95
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