• Flow rate accuracy and repeatability trials conducted on dry silica sand indicate a percentage error of +1.3% of sample average at 2 Sigma based on 15 consecutive samples of 100 seconds and 175 lbs. sample weight. For sulphur pastilles an error of +0.83% of sample average at 2 Sigma based on
20 consecutive samples of 45 seconds and 100 lbs. of sample weight