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Description
The DTS100 is a floor standing, self-contained
test system designed to measure the diffusivity
of oxygen through porous samples.
The principal of operation is that pure nitrogen
and oxygen are passed over opposite ends of
the sample, the nitrogen gas is then passed to
an oxygen analyser to determine the quantity of
oxygen within the nitrogen.
As the differential pressure across the sample is
zero, oxygen passing through the sample is due to
diffusion alone.
A constant nitrogen flow is maintained using a mass flow controller to
ensure that stable
oxygen readings may be obtained. Differential pressure across the sample
is monitored
using a high stability capacitance manometer and flow in the oxygen line
is modulated to
achieve zero pressure. Closed
loop control circuits carry out
these functions automatically,
eliminating potential human
error.
Nitrogen flow rate, oxygen flow
rate, differential pressure
across the sample and concentration
of oxygen in nitrogen
are all displayed and can be
data logged for later analysis.
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