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Figure 4.5
EGA Furnace
TA I
TGA 2950
NSTRUMENTS
Description of the TGA 2950
EGA Furnace
The (Evolved Gas Analysis) EGA furnace
consists of a quartz glass sample tube sur-
rounded by an electric resistance heater, both of
which are contained within a water-cooled
furnace housing. The housing is mounted to a
furnace base that raises and lowers the furnace
for sample loading and unloading. See Figure 4.5
.
The sample tube has a purge gas inlet that
passes through the right side of the furnace
housing. A fitting on the left side of the housing
allows connection of a transfer line to carry
exhaust gas to a spectrometer such as a FTIR.
Because the heater is external to the sample
tube, evolved gases from sample decomposition
4–11
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