Expiratory Flow Meter Nozzle for child and adult use Adult use. Nozzle child use. The expiratory flow meter datospir peak-10 measures the intensity of flow of air that passes by the airways when is a more rapid and intense possible Airmax. The level of the figure will inform doctor on the degree of severity of disease of the patient. Incorporates a simple tool of self-control For The Patient (the traffic lights). The datospir peak-10 has been designed and manufactured in accordance with the European Health Products Directive 93/42/EEC. According to Directive Class I The Team is with function of measurement. Also complies with the EN 13826.