How much breath does it take for the Intox to capture a sample?

How much breath does it take for the Intox to capture a sample?

• A. 1.0 liters
• B. 1.5 liters
• C. 2.0 liters
• D. 0.5 liter

Answer: (B)

Breath volume matters because the device needs alveolar air, not just the air in the mouth or throat, to give an accurate BAC. The Intox EC/IR II is designed to capture a sample that includes enough end-expiratory air, which typically requires about 1.5 liters of breath. Blowing less than that can leave too much dead-space air in the sample, leading to an unreliable or lower reading. The instrument signals when a valid sample has been captured, which corresponds to roughly 1.5 liters of breath in most cases.

Breath volume matters because the device needs alveolar air, not just the air in the mouth or throat, to give an accurate BAC. The Intox EC/IR II is designed to capture a sample that includes enough end-expiratory air, which typically requires about 1.5 liters of breath. Blowing less than that can leave too much dead-space air in the sample, leading to an unreliable or lower reading. The instrument signals when a valid sample has been captured, which corresponds to roughly 1.5 liters of breath in most cases.