The well known Gilibrator-2 is capable of calibrating almost any air sampling pump from 1 mL/min to 30 LPM. Using automated bubble flow meter technology, the Gilibrator-2 accurately calculates flow rate and is a true primary standard. Simple to use and with a large LCD display, the Gilibrator-2 simultaneously displays flow rate, average flow rate, and the current sample count in the series. Gilibrator-2′s are the most commonly known air flow calibrator rental instrument due to their portability, accuracy, and established presence in the field for over a decade.