Portable breathalyzers tested against police unit
Best Breathalyzer Consumer Reports on April 2024 Shopping Deals at Bestonio.com
This device is used to measure Peak Expiratory Flow (PEF) and Forced Expiratory Volume in 1-second (FEV1) in both children and adults. PEF is the fastest speed air can be blown out of the lungs after inhalation. FEV1 measures the volume after exhaling in 1-second. Peak Flow (PEF) and Forced Expiratory Volume in 1-second (FEV1) measurements can tell... [Read More]
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