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CAT NO: DIDACTICNLE-Export-400006
Water Vapour Permeability Tester For Testing Lab Workshop.
Water Vapour Permeability Tester - For Testing Lab
The water vapour permeability of fabric is determined by placing the
test specimen over the open mouth of a test dish, which contains water
and assembly placed in a controlled atmosphere. After a period of
established equilibrium of the water vapour pressure gradient across the
test specimen, successive weightings of the assembled dish are made and
the rate of water vapour permeation through the specimen is determined.
The water vapour permeability index is calculated by expressing the
water vapour permeability of the test fabric as a percentage of the
water vapour permeability of a reference woven fabric which is tested in
a similar manner concurrently and along side the test specimen.
TheWater Vapour Permeability Tester consists
of eight dishes with cover ring & specimen support and a turn table
for rotating the test dishes at a uniform speed with a built in timer.
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