has output measurement used by diagnostic tool Spirometry Diagnostic Device Lung Volume Measurement Lung Volume Test Spirometer A spirometer is an apparatus for measuring the volume of air inspired and expired by the lungs. It is a precision differential pressure transducer for the measurements of respiration flow rates. The spirometer records the amount of air and the rate of air that is breathed in and out over a specified period of time. http://purl.obolibrary.org/obo/ERO_0000452 Sufficient ERO:0000452 SCDO:0001099