The oxygen flow rate is read at the middle of the ball indicator inside the flow meter tube.
Here's a more detailed explanation:
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Locate the Ball: The flow meter has a clear, calibrated tube with a ball inside. The ball floats within the tube due to the flow of oxygen.
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Read at the Middle: Unlike some other types of floats where you might read at the top or bottom edge, with the ball in an oxygen flow meter, you read the flow rate where the middle of the ball aligns with the scale on the tube.
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Ensure Proper Level: Make sure your eye is level with the flow meter to avoid parallax error (an apparent shift in the ball's position due to your viewing angle).
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Check the Units: The flow rate is usually measured in liters per minute (LPM). Be sure to note the units indicated on the flow meter.
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Account for Other Float Types: As the reference notes, different types of flow meters might use different float shapes. Always confirm where to read the flow rate (top, bottom, or middle) based on the specific meter being used. If unsure, consult the device's manual or ask a healthcare professional.
