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Flue Gas Analysers (FGAs) are often known as Electronic Portable Combustion Gas
Analysers (EPCGAs) and have been available for around 20 years.
These are battery powered electronic instruments containing gas sensors that
respond to the various gases found within the flues of combustion appliances, whether
theses are fired by gas, oil or solid fuels.
A separate hand-held probe is connected to the instrument, usually through a water
and dust filter, and a pump is able to extract a sample of the combustion gas from
the flue, through the probe and into the instrument.Sensors enable the instrument to calculate and display readings of oxygen
(O2), carbon monoxide (CO), carbon dioxide (CO2) and the ratio
of CO to CO2.Some models
offer additional features, such as temperature, humidity, pressure or gas leak detection.
There
are British and European standards that govern the performance and accuracy of these
instruments, namely BS 7927 and EN 50379 respectively.The use and operation of combustion gas analysers is covered by BS 7967.Competency in the use of these instruments
can be demonstrated by the ACS assessment CPA1.Instruments generally require an annual calibration, and sensors will need
to be periodically replaced.When service
work is required, we recommend that you contact the manufacturer of the instrument
(see below).
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