The spirometer was originally invented in the 1840s by John Hutchinson an English surgeon. The volume of exhaled air from fully inflated lungs could accurately be measured by exhaling into a tube leading into the bucket. Helped in the measurement of vital capacity.
In 1950 Dr. Tifffeneau of France introduced the forced measurement of air volume during a given time frame, i.e; forced expiratory volume in 1 second, FEV1.
Wright B.M. and McKerrow C.B. introduced the peak flow meter in 1959.
In 2008, Advance Medical Engineering developed the world's first wireless spirometer with 3D Tilt-Sensing for far greater quality control in the testing environment.