Notifications
Back

Vapor Pressure Analyzer
Knudsen Effusion Method

Employing the Knudsen Effusion Method, an advanced dynamic gravimetric technique, the Vapor Pressure Analyzer (VPA) is an unparalleled tool for labs seeking to measure the vapor pressure of solids, liquids, and oils.

With unique hardware & engineering features, this powerful machine is employed by researchers around the world to gain accurate, detailed the vapor pressure measurements essential to product development and formulation in a range of industries, from agriculture to pharmaceuticals.

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 Knudsen effusion method is based on the rate of escape of vapor molecules through an orifice of known dimensions in a Knudsen cell into a vacuum at a known temperature. The rate of mass loss through the orifice is measured by the Surface Measurement Systems’ UltraBalance within the VPA system. The vapor pressure of a material at thermodynamic equilibrium is a fundamental property of the material and is only a function of temperature.

Find out more about the Vapor Pressure Analyzer

장비 문의는 아래의 버튼을 클릭하여 문의 주세요!