MSA Calibration Gas Cylinder (34L): 1.45% Methane, 15% Oxygen, 60 ppm Carbon Monoxide, 20 ppm Hydrogen Sulfide, 10 ppm Sulphur Dioxide, Nitrogen

MSA Calibration Gas Cylinder calibrates all instruments. The gas mixture in calibration gas cylinders is certified to be prepared gravimetrically, using NIST traceable weights. The lot number and nominal value of the gas constituents in volume, percent by mass, PPM, or volume is specified on the cylinder. Aluminum 500 psig cylinder contains approximately 34 liters at atmospheric pressure. Measures 13-3/4 x 3-inches and weighs 1 pound, 11 ounces.