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System Component Description
Sample Probe
Sample Probe
7-2
Omni FTIR Multi Gas CEMS Instruction Manual
Figure 7–1. FTIR Multi Gas CEMS System Component Layout
The direct extractive probe assembly is used to extract and condition a
continuous sample from a stack or duct for transport to the system
7–2). It is designed for easy installation, reliable operation and trouble-free
maintenance.
The probe assembly includes a heated 2 micron ceramic filter with a large
surface area and high capacity. The special design of the heating element
permits controlled heating of the complete filter housing, including the
mounting flange up to 200 °C. This ensures reliable operation external to
the process preventing the temperature falling below the dew-point. The
housing design offers little or no dead volume external to the process.
Also included in the probe assembly are a 3-way backflush/calibration valve
and a blow-back tank.
Inside the stack are a heated stainless steel probe barrel (stinger) which can
be heated up to 250 °C, and a 25 micron pre-filter assembly.
Separate temperature controllers are included for the probe barrel and filter
assemblies. Temperature alarm contacts are also provided in the controllers
to signal to the system if the probe or barrel are not running at the correct
temperature.
The standard probe has a 4-inch ANSI flange and a 1.0 meter probe barrel
length. Other flange sizes and barrel lengths may be purchased depending
on requirements.
(Figure
Thermo Fisher Scientific
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