Perma Pure Baldwin-Series MP5400 - Manual (Page 6)

Section C: Principle of Operation 6
Figure 2: Heat Exchanger, Impinger and Heat Sink Assembly
transfer block is pumped to the heat sink where it is then dissipated into the air by
the heat sink fan. See Figure 2. The desired temperature is maintained by a closed
loop control system, which is implemented through a proportional controller. The
controller uses a type K thermocouple in the heat transfer block located very close to
the cold side of the peltier element as the input sensor.
The sample gas is passed to the thermo-electric cooler via the heated filter sample
probe and heated sample line. The thermo-electric cooler lowers the sample dew
point to 5
° C (41 ° F). As the gas cools and the moisture vapor condenses, the
condensate exits the heat exchanger through the bottom drain connection.
Particulate matter which passes through the sample cooler is removed by an
optional Baldwin pre-filter, located downstream from the cooler along with an
optional water slip sensor. The conditioned sample gas can then be directed to the
gas analyzers.