Medically reviewed by Daniel More, MD A peak flow meter is used to measure your peak expiratory flow rate (PEFR). PEFR describes how quickly your lungs expel air during a forceful exhalation after ...

Smart Peak Flow (Smart Respiratory Products) is a digital peak flow meter and asthma tracking tool. It is designed for monitoring asthma. Smart Peak Flow measures peak expiratory flow (PEF). This is ...