© Edwards Limited 2009. All rights reserved.
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INTRODUCTION
D141-32-880 Issue A
1.3
Principal of operation
The GasCheck G3 contains a heated thermistor bead that transmits heat to a block of material that remains at a
constant temperature. As air is drawn through the detector chamber, a constant amount of heat passes from the
bead to the block. Gases that have a different thermal conductivity to air will affect the rate at which heat transmits
from the bead to the block. These rates of change are measured and can be displayed as leak rates.
1.4
Applications
You can use the GasCheck G3 on many types of applications, including those listed below.
z
Quality assurance testing on manufactured component seals.
z
Laboratory applications, such as the detection of leaks from gas chromatographs, from mass spectrometers,
from gas cylinders and fittings.
z
Industrial applications, such as the detection of leaks from gas installations, in cylinder receiving rooms,
from pipeline assemblies, the detection of leaks from stored gases and the detection of vapours released
from stored chemicals.
z
Medical applications, such as the detection of leaks from gas bottles and pipelines and leak testing of
membrane materials, glove boxes and so forth.
z
Pneumatic applications, such as leak testing of pipeline joints, gaskets and so forth.
