MSA SAFETY SALES, LLC 710882 GAS CAL 60PPM CO IN AIR-

MSA offers a complete line of calibration gas cylinders to calibrate 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.