The mini-BUCKa? Primary Flow Calibrator is the industry standard for day-to-day flow verification and calibration of your personal and environmental sampling pumps. It is also suitable for verifying rotameters, setting instrument panels, and calibrating laboratory instruments. No more lugging oversized calibration panels. No more rotameter inaccuracies. The mini-BUCKa? is accurate at any attitude and can be used for flow measurements with sampling media.