PSI Guide, Meaning , Facts, Information and Description

Pounds-force per Square Inch (PSI) is a non-SI unit of pressure.

For technical accuracy, psi must be expressed as psig (pounds-force per square inch gauge) or psia (pounds-force per square inch absolute; that is, gauge pressure plus sea level atmospheric pressure, or psig plus approximately 14.7 psi). psig can be further subdivided into psivg (psi vented gauge) and psisg (psi sealed gauge), the difference being that psisg measures the difference in psi between a chamber of air sealed at atmospheric pressure and the pressure at the measuring point, while psivg measures the difference between the measuring point and the local pressure. Sometimes psid (psi difference) is seen; this should always refer to a measurement of the difference between two pressures.

1 psi approximately equals 6.895 kPa

See also

• Psi
• parapsychology
• conversion of units
• Other units of pressure

External link

• Conversion Calculator for Units of Pressure
• Pressure measurement primer

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