To measure the vapour permeability of flat samples they are usually clamped between two halves of a diffusion chamber.Versaperm instruments are unique in their ability to accommodate materials up to approximately 50 mm in thickness in standard mode. Although this is significantly more than most sample holder designs, in fact it is only a limitation in standard mode, and for some applications, the chamber has been modified to accommodate much thicker samples.

 

There are two common chamber sizes, 1/200 m² and 1/1000 m², which can accommodate samples of about 100mmx100mm and 30mmx30mm. Resolution is higher with larger surface areas. Samples should ideally be larger than the minimum to ease handling.

To test different samples against different sample types against different vapours and gases we have developed a wide range of sensor options to measure the vapour permeability accurately and quickly.

 

Vapour permeability sensors

Carbon Dioxide	Hydrocarbons	Photoionization
Catalytic Combustion	Hydrogen	Pressure Measurements
Coulometric	Infrared	Semiconductor
Electrochemical	Oxygen	Thermal Conductivity
Flame Ionization	Mass Spectrometer	Water Vapour
Gas Chromatography	Nitrogen	ZrO2
Helium	Paramagnetic

We are currently unable to use radioactive or highly toxic gases. However, please call to discuss your application.

Some of the many sample types we can test in our permeability testing laboratory

Adhesives	Fuel Cells	Paper
Aerospace	Gravimetric	Packaging
Automotive	ISO15105	Pharmaceutical
Blister Packs	Laboratory	Plastics and Rubber
Building Materials	Leaks and Seals	Quality Control
Business waste	MAP (Modified Atmosphere Packaging)	Sachets an Powders
Edible films	Marine	Solvents
Electronics	Mastics and Adhesives	Textiles
Films	Medical	Vapour Permeability
Freezer Burn	O Rings

Foils and sachets