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A simple testing instrument for determining the water vapour transmission rate through sheet materials using the first principle gravimetric method. A selection of cup depths available with a choice of EZ easy open flange rings or mechanical screw closures.

The Vapometer is used for determining the water vapor permeability of sheet materials such as specialty paper grades, polyethylene, building material, leather, weather­proof clothing, vinyl, foil, laminates and other thin sheet materials. Suitable for use with both barrier films and breathable membranes.
Complies with ASTM E96-80, Tappi T-448, Tappi T464 os-79.

Our Water Vapour Permeability Cups have a mechanical sealing system using two neoprene gaskets and a Teflon seal. They can be used at any temperature or relative hu­midity to ensure product performance across different conditions.

Depending on the end use, water or a desiccant is placed in the base of the container. The specimen is then quickly sealed with the threaded flanged ring between the two neoprene gaskets and placed in a test chamber that con­trols the atmosphere. Vapor loss or gain is measured by re­cording the weight of the sample at successive time intervals. The cups are serially numbered for an easy way to keep track of the different samples.

68-3000 Vapometer EZ-Cups
The Vapometer Cup consists of a light weight aluminum cup and an aluminum threaded flanged ring with two neoprene gaskets with a Teflon seal that hold the speci­men in place. This design was specifically created to elimi­nate edge leakage and to provide fast secure sealing of the specimen between the gaskets. Suitable for samples up to 3mm ( 0.125 inch ) thick.

Specimens are easily loaded and sealed in place by twist­ing the threaded upper aluminum flange in place. No more individual screws to tighten! Accurate samples for the Va­pometer (2.9375 in. dia.) can be quickly prepared using a Circular Steel Die (2.9375 in. dia.) or the 240-7B Alfa Cutter.

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