SS500e/SS2000e/SS3000e Gas Analyzer
1–8 4900002230 rev. D 2-6-20
With the resulting low-noise signal and use of fast post-processing algorithms,
reliable parts per million (ppm) or parts per billion (ppb) detection levels are
possible (depending on target and background species) at real-time response
rates (on the order of 1 second).
All SpectraSensors TDL gas analyzers employ a similar design and hardware
platform. Measuring different trace gases in various mixed hydrocarbon
background streams is accomplished by selecting a different optimum diode
laser wavelength between 700-3000 nm, which provides the least amount of
sensitivity to background stream variations.
Getting Familiar with the Analyzer
SpectraSensors’ SS500e/SS2000e/SS3000e analyzers are typically comprised
of two main enclosures; the analyzer electronics and the sample conditioning
system (SCS), as shown in Figure 1–5. Refer to Appendix A for system
drawings.
On the front panel of the analyzer, the keypad and LCD display serve as the
user interface to the analyzer. Internally, the control electronics drive the laser,
collect the signal, analyze the spectra and provide measurement output
signals.
Housed inside the SCS are the measurement cell and heater along with flow
devices to control flow and pressure for the measurement cell and the bypass
loop.
Normalized
2f Signal
Wavelength [a.u.]
Signal [a.u.]
Figure 1–4 Typical normalized 2f signal; species
concentration is proportional to the peak height
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