Water vapour transmission meter

Published:  11 August, 2009

There is no such thing as a perfect seal. Some techniques are good at keeping water out in its liquid form - but many more are very poor as a barrier to water vapour.  But how can you tell which materials, seals, mastics, or O-rings are right for your purpose? Water vapour permeability measurement specialist Versaperm Limited, has introduced a simple way to test this traditionally difficult factor.

The new Versaperm's Water Vapour Transmission meter can cope with several samples, seals or enclosures at a time, often give a reading in as little as 30 minutes conventional gravimetric testing takes days or even weeks to achieve the same thing - and is significantly less accurate.

Seals and enclosures can be highly sensitive to changes in pressure, temperature and other conditions.  Testing is the only way to ensure that a seal is fit-for-purpose and that Quality Control is being maintained.

The WVTR meter is easy to use and gives a series of measurements that can be saved or simply read off a screen.  It 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.For further information please visit: www.versaperm.co.uk

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