Peak Flow Meter Specifications

• Product Type: Mechanical Peak Expiratory Flow Meter (PEFM) / Respiratory Spirometer

• Measurement Scale: Peak Expiratory Flow Rate in Liters per Minute (L/min)

• Measurement Range: 60 L/min to 800 L/min (Full Range / Standard Scale)

• Scale Markings: Graduated increments starting at 60, 100, 150, 200, 250, 300 up to 800 L/min

• Zone Indicators: 3 color-coded adjustable sliders for asthma management:

  • Green Indicator: Green Zone (Normal/Safe Range, typically 80%–100% of personal best)

  • Yellow Indicator: Yellow Zone (Caution Range, typically 50%–80% of personal best)

  • Red Indicator: Red Zone (Alert/Danger Range, below 50% of personal best)

• Measurement Indicator: Red main sliding marker inside the central measuring slot

• Body Design: Durable plastic housing with integrated ergonomic mouthpiece base (blue/white design)

Here is the step-by-step guide to using a Peak Flow Meter for monitoring lung function:

Step 1: Preparation

• Reset the Indicator: Slide the main red indicator marker down to the bottom of the scale (at or below 60 L/min).

• Stand or Sit Upright: Position yourself comfortably upright to ensure maximum lung expansion.

• Hold Correctly: Hold the device by its body without blocking the side slots or the back vent.

Step 2: Taking the Measurement

• Inhale Fully: Take a deep breath in, completely filling your lungs with air.

• Place Mouthpiece: Put the mouthpiece in your mouth, seal your lips tightly around it, and keep your tongue away from the opening.

• Blow Hard and Fast: Blow out as hard and fast as you can in a single, quick burst (like blowing out birthday candles).

• Check the Value: Note the number indicated by the red marker on the scale.

Step 3: Recording & Maintenance

• Repeat Three Times: Perform the measurement 3 times in total, resetting the slider to the bottom before each attempt.

• Record the Highest Score: Write down the highest of the 3 readings (not the average) in your asthma diary or tracking log.

• Clean Regularly: Wash the mouthpiece with warm water and mild soap as recommended by the manufacturer, then let it air dry completely.

Zone Management Tip: Adjust the green, yellow, and red zone sliders based on your personal best reading and your doctor's recommended action plan.

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