How To Calculate The Factor For The Measure Air Meter

Calculating the factor for measure air meter is crucial in various industries, including HVAC, aerospace, and automotive. It helps determine the air density, which is vital for designing and maintaining systems that rely on air flow.

1. Enter the volume in cubic meters (m³).
2. Enter the pressure in pascals (Pa).
3. Enter the temperature in degrees Celsius (°C).
4. Click the ‘Calculate’ button.

The formula to calculate the air meter factor is:

Factor = (P * (273.15 + T)) / (293.15 * 101325)

Where:

• P is the pressure in pascals (Pa),
• T is the temperature in degrees Celsius (°C),
• 101325 is the standard atmospheric pressure at sea level, and
• 293.15 is the standard temperature at sea level.

Air Density Comparison at Different Pressures and Temperatures

Pressure (Pa)	Temperature (°C)	Air Density (kg/m³)
101325	20	1.225
150000	20	1.235
101325	40	1.165

Air Meter Factor Comparison at Different Pressures and Temperatures

Pressure (Pa)	Temperature (°C)	Air Meter Factor
101325	20	0.999
150000	20	1.001
101325	40	0.988

• Always use the standard atmospheric pressure and temperature for accurate results.
• Consider the altitude when measuring pressure, as it affects the air density.
• Regularly calibrate your air meter to ensure accurate readings.

What is the standard atmospheric pressure?

The standard atmospheric pressure at sea level is 101325 pascals (Pa).

How does temperature affect air density?

As temperature increases, air molecules move faster and spread out, decreasing the air density.

EPA Air Quality Data – Engineering ToolBox Air Density Calculator