The peak flow meter works by measuring how fast air comes out of the lungs when you exhale forcefully after inhaling fully. This measure is called a "peak expiratory flow," or "PEF." ...

Installing Rachio’s Wireless Flow Meter on my irrigation system required a couple of adapters because the meter is designed to fit pipes that are 3/4- to 1-inch in diameter.

A peak flow meter is a user-friendly, portable device that helps measure the ability of the lungs to expel air. It estimates peak expiratory flow rate which is a measure of how rapidly air can be ...

The flow meter uses a single “A”- size battery that can last up to 20 years. Measuring as little as 0.5 litres of water per minute with better than 1% accuracy, its fast ultrasonic pulses can be ...