TA I
NSTRUMENTS
TGA 2050 4–9
Furnace
The TGA furnace consists of a quartz glass
sample tube surrounded 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 4.4.
Figure 4.4
Furnace
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
within the sample tube do not come in contact
with the resistance elements or the furnace
ceramic refractory.
Description of the TGA 2050