SS500e/SS2000e/SS3000e Gas Analyzer
4–2 4900002230 rev. D 2-6-20
Typical SCS Component Overview
All SpectraSensors TDL analyzers are designed for extractive sampling rather
than in situ applications. This allows for sample conditioning, filtration,
temperature, pressure and flow control to protect the optical components of
the system, and provides for ease of maintenance without shutting down the
process.
Some of the typical components used in the SCS will be described in this
section. The SCS for your analyzer may not use all of these components, and
may also include additional special devices not discussed here.
Sample probe
A sample probe is used to provide a representative sample of any process
stream. This sample can only be made if the stream is in a vapor phase. Mixed
liquid/vapor streams must be avoided, so the location of the sample probe is
critical in many processes.
A representative sample of the process can only be taken away from the wall
of the process piping. Also, dirt and liquids tend to accumulate close to the
walls of the piping, especially near the bottom of horizontal runs of pipe.
Therefore, SpectraSensors recommends probes that fit well into the pipe.
These may be removable to protect the probe from pipeline “pigging”.
Sample regulators at the probe
The pressure of the sample gas is usually reduced at or very close to the
sample probe, sometimes in the probe itself, to reduce the sample transport
lag time to deliver the sample to the analyzer. A guard filter is typically used to
protect the regulator from larger particulates in the sample.
Refer to Figure 4–1 that shows the interface of the probe and the analyzer
system. The analyzer system provided by SpectraSensors is represented by
the blue dashed outline. The probe and field pressure reducing station may also
be supplied by SpectraSensors, but is separate from the analyzer system.
For questions regarding your SCS, please refer to “Service
Contact” on page B-23.
Contact Technical Service to provide the temperature, pressure
and complete stream composition of the process stream for
advise and recommendations regarding locating the sample point.
Please refer to “Service Contact” on page B-23.
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