Rotameter 0.4 - 4 lpmThe Rotameter 0. 4 4 lmp is the ideal flowmeter for calibrating your pumps before conducting an AMEA test. With its precise calibration, you can ensure that every test is run at a consistent 2L min for 1 hour. To achieve the highest level of precision and standardization, we recommend calibrating your pumps prior to beginning your AMEA sample. Buck Libra L 4 AMEA Pump Calibration Instructions