Versaperm Vapour Permeability measurement

Laboratory (R&D) Permeability measurements


For sensitive Water Vapour, Hydrocarbon, O2, N2, He (and other), vapour permeability testing in the QC or R&D laboratory Our new permeability meter allows your Laboratory to measure the vapour permeability for a wide range of gases, including O2, N2, He, Hydrocarbons gases and water vapour.

Laboratory R&D Permeability MeasurementThe equipment quickly and reliably measures the permeability and diffusive flow of vapours across samples, finished packages, seals, containers, flat samples, equipment etc.

Our permeability meter needs no re-calibration and requires, at most, minimal training to give results that can be as accurate to better than one part per million (with some samples a few parts per hundred million).  Sensitivities are in the range 0.05 – 3200g/m2/day depending on the gas, material under test and sensor used.

Its computerised control makes it simple to operate. Additionally we offer a comprehensive permeability laboratory testing service for permeability measurements

Comparison of Typical WVTR’s

Material Relative Permeability*
Cold Form Foil 0
CTFE 0.02
COC 0.24-0.29
Polychlorotrifuoroethylene (PCTFE or Aclar) 0.16
Polyvinylidene chloride (PVDC or saran) 0.2
High-density polyethylene (HDPE) 1.2
Polypropylene (PP) 1.6
Good Vapour Barrier materials
Polyethylene terephthalate (PET) 5.2
Low-density polyethylene (LDPE) 4.8
Low vapour-barrier materials
Polyvinyl choride PVC 16
Acrylonitrile copolymer (Barex) 20
Polyamide (PA or Nylon) 100

*Best Vapour-barrier materials Relative Permeability based on Polyamide at 100%

Laboratory (R&D) permeability testing

Semi-permeable membranes permit certain molecules or ions to pass through them by diffusion (and occasionally by specialized "facilitated diffusion").  Permeability is a measure of the rate of passage through the membrane and depends on the pressure, concentration, and temperature of the molecules or solutes on either side, as well as the permeability of the membrane.  This measurement is frequently required has become easy, quick and reliable to measure in the R&D or QC laboratory.

Click here for the Wikipedia article on the permeability of semi-permiable membranes

Click here for a press release on Permeability measurement in the laboratory (R&D)

Click here for an article on permeability measurement