A very good instruction manual was provided with the MSA model E instrument. It covers all ... The best estimate of oxygen concentration on the meter scale in the 15- to 20-percent range would be slightly greater than 0.25 to 0.5 percent.
|Title||:||Accuracy and precision of several portable gas detectors|
|Author||:||Herbert B. Carroll, Frederick E. Armstrong, United States. Bureau of Mines|