Common Vacuum Measurement Units and Their Conversion
Common units for measuring vacuum levels include Pascal (Pa), millibar (mbar), Torr, and standard atmosphere (atm). Here are the conversion relationships between these units:
Pascal (Pa) is the SI unit for pressure.
- 1 Pa = 0.00750062 Torr
- 1 Pa = 0.01 mbar
- 1 Pa = 9.86923×10^-6 atm
Millibar (mbar) is another commonly used engineering unit, especially in meteorology.
- 1 mbar = 100 Pa
- 1 mbar = 0.750062 Torr
- 1 mbar = 9.86923×10^-4 atm
Torr is named after the Italian physicist Evangelista Torricelli and is primarily used to describe low pressures.
- 1 Torr = 133.322 Pa
- 1 Torr = 1.33322 mbar
- 1 Torr = 1/760 atm
Standard Atmosphere (atm) is defined as the average atmospheric pressure at sea level at 0°C.
- 1 atm = 101325 Pa
- 1 atm = 1013.25 mbar
- 1 atm = 760 Torr
These conversion factors allow you to switch between different units depending on your application. For example, Pascals might be more common in scientific research, while millibars or Torr may be encountered more frequently in industrial applications. Standard atmospheres are typically used to represent pressure relative to normal atmospheric pressure. To convert from one unit to another, simply apply the appropriate conversion factor mentioned above.
