Pressure Units; Gauge Pressure (Psig); Absolute Pressure (Psia); Atmospheric Pressure - Agilent Technologies G3183B Installation And Operation Manual

1
Introduction

Pressure Units

All pressure figures in this manual are given in pounds per square inch.

Gauge pressure (psig)

This is the pressure as measured by most pressure gauge. It is the pressure in
excess of atmospheric pressure.

Absolute pressure (psia)

This is the actual pressure relative to vacuum. It is the sum of the gauge
pressure and the atmospheric pressure.

Atmospheric pressure

Atmospheric pressure at sea level = 14.696 psia = 101.32 kPa

Conversion

kPa = psi × 6.8947
16 Installation and Operation Guide