Manometric Testing to ISO 15105-1
According to ISO-1501-1:2007 manometric testing to is "....especially
suitable for the determination of the gas transmission rate
of each component of a gas mixture."
The Versaperm permeability
meter is especially suited to this task for almost any gas (different
sensors may be used for different gases).
>The basic technique employed
is simple and quick:-
1. Clamp the film
or sheet sample into the test chamber of the instrument
2. Evacuate both sides of sample to 10-2 millibar
3. Introduce the test gas at 1 bar on one side of sample and measure
pressure change on other side.
From this it is simple to calculate flow rate through the material.
The Versaperm instrument can
measure less than
1 ppm of water vapour in 100ml/min of the swept gas, (the rates for other gases depends on the specific gas
under test) and this translates to very low readings of around
0.002g/m²/day. We are also techniques to enhance this sensitivity
At the other end of the scale, the instrument can measure up to
3000 ppm water vapour. Thus, using the normal 50 cm² surface
area, a maximum of 64 g/m2/day can be read, although this can
be increased 3200 by utilizing a 10 cm² chamber and other
devices to reduce the surface area.>
We customise each instrument to meet the range required by the customer's application.
Manometric testing is where
an instrument is used for measuring the pressure of liquids and gases.
The basic instrument for this is called a sphygmomanometer.
is the accepted standard for the determination of the gas-transmission rate
under a differential pressure of single-layer plastic films or sheets
with multi-layer structures
The standard discusses
two techniques - one uses a pressure sensor, the
other a gas chromatograph(to measures the amount of gas which
permeates through a specific test specimen.
download a copy of ISO 15105-1:2007 click here.