You can buy your peak flow meter over the counter at a pharmacy, medical supply store, or online. Always use the same brand and model peak flow meter every time to avoid meter-to-meter variations.

A peak flow meter is a handheld device that measures airflow rate and can help those with respiratory conditions like asthma monitor their condition.

A peak flow meter is an inexpensive, portable, handheld device for those with asthma that is used to measure how well air moves out of your lungs. Measuring your peak flow using this meter is an ...