F&J has a state-of-the-art calibration laboratory. Utilizing precision laminar flow elements, computer-controlled reference instruments, and computer-controlled flow sources, F&J can provide highly-accurate, repeatable, flow calibrations. We can calibrate many air samplers and air flow calibrators, even if they aren't an F&J product. Reference instruments are calibrated by the OEM and traceable to N.I.S.T. (National Institute of...