The Vapor Pressure Analyzer or VPA measures the vapor pressures of solids, liquids and oils
using the Knudsen effusion method.
The vapor pressure is an important material physical property that defines the amount of vapor phase
material that exists in equilibrium with the original material. All materials enter the vapor phase by
sublimation (solid – gas) or evaporation (liquid – gas). The vapor pressure of a material at thermodynamic
equilibrium is a fundamental property of the material and is only a function of temperature