The Fluke Calibration molbox/molbloc gas flow calibration system offers uncertainties from +/-0.5% to +/-0.125% of reading for a large selection of gasses. Laminar flow molblocs cover up to 100 slm and sonicc nozzle molblocs expand the molbloc flow range to 5000 slm. Fully-automated calibration is now possible using COMPASS for Flow software and Hall Associates can customize COMPASS to provide calibration certificates that meet your companies guidelines.