A portable, battery-powered, general-purpose device intended to measure pneumatic line flow rates and pressures (positive and negative) in order to calibrate or test a medical (e.g., anaesthesia machines, suction devices) or industrial device and is not dedicated to a specific discipline. It typically consists of a hand-held electronic box with appropriate pneumatic line connections, a digital display and might also contain built-in sensors (e.g., thermometer, hygrometer) in order to measure additional properties (e.g., atmospheric pressure, humidity and temperature). It is intended to be used by a professional in a professional setting (e.g., clinical engineering).