RT Journal Article SR Electronic T1 Spirometers JF Breathe JO breathe FD European Respiratory Society SP 251 OP 254 VO 4 IS 3 A1 F. de Jongh YR 2008 UL http://breathe.ersjournals.com/content/4/3/251.abstract AB Educational aims To outline the characteristics of currently available types of spirometer. To explain the requirements a spirometer should fulfil. Summary There are many spirometers on the market. They can be divided roughly into a group that primarily measures volume and a group that primarily measures flow. Quality control and calibration should be performed on a regular basis to ensure that a device (still) functions appropriately. The types have different characteristics and are optimal for different circumstances (from a simple peak-flow meter to monitor asthma at home to an ultrasonic device to measure a patient in a pulmonary function lab). In this article, the characteristics of the currently available spirometers are discussed, as well as the requirements they should fulfil.