Meters monitor water vapours

Versaperm's MK VI water transmission meter allows users to monitor water vapour levels that may be getting past seals.

Seals, pipes, joints, mastics, O rings, cables and sheaths are excellent at keeping water and other fluids out.

Sadly many of them just aren't a barrier to water vapour - so the fluid gets through anyway.

This seemingly simple effect can be one of the biggest problems in manufacturing.

It causes electronics to deteriorate, components to fail and products to rot.

Big objects can suffer just as badly - in fact cars, planes and even rockets have all failed, simply because seals, O rings and mastics don't always keep water vapour out.

Versaperm has launched a new way to measure this easily, quickly and accurately.

The new WVTR (Water Vapour TRansmission) MK VI meter gives results that can be accurate to better than one part per million (with some samples a few parts per hundred million).

Results for some materials can be obtained in as little as 30 minutes whereas conventional gravimetric testing can take several days for a single measurement.

It can measure the vapour permeability not just of flat materials but of containers, enclosures, products and seals as well.

The meter's highly automated computerised control is easy to use, requiring minimal training, even to cope with several samples at a time.

Sensitivities are typically in the range 0.05 - 3200g/m2/day and the instrument can be configured to measure the diffusion rates of most gaseous elements (water, O2, CO2, hydrocarbons).

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