Figure 12-5: Pmt Optical Filter Bandwidth - Teledyne t100 Operation Manual

Principles of Operation
12.1.7.2. PMT OPTICAL FILTER
270
The PMT used in the T100 reacts to a wide spectrum of light which includes much of
the visible spectrum and most of the UV spectrum. Even though the 214 nm light used
to excite the SO is focused away from the PMT, some of it scatters in the direction of
2
the PMT as it interacts with the sample gas. A second optical band pass filter placed
between the sample chamber (refer to Figure 12-2) and the PMT strips away light
outside of the fluorescence spectrum of decaying SO
reflected UV form the source lamp and other stray light.
5
10
4
10
3
10
2
10
1
10
1
0
100

Figure 12-5: PMT Optical Filter Bandwidth

Teledyne API - T100 UV Fluorescence SO
* (refer to Figure 12-5) including
2
PMT OPTICAL FILTER
BANDWIDTH
200 300
WAVELENGTH (nm)
Analyzer
2
SO * FLUORESCENT
2
SPECTRUM
400 500
06807F DCN7335