A spirometer is a device that measures the flow of air during inhalation and expiration. Using pressure transducer, ultrasonic, or water gauge technology, these measurements can be used to help diagnose and monitor a variety of respiratory diseases, identifying both obstructive and restrictive breathing patterns. At GoToMedSupply.com, we know getting accurate measurements is essential. We carry only the top brands of spirometers and other respiratory products to ensure you are getting the quality you can trust. Shop our selection of spirometers at our low prices to find the right device for you.