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9. THEORY OF OPERATION
9.1. The UV Light Path
The UV light path of the T100H is similar to that of the T100 (see Section 10.2 of the T100 Manual). The main
differences between the T100H and the T100 are:
The location of the reference detector (See Section 9.1.1 of this addendum).
The methods used to reject for certain measurement interferents is different (see Section 9.1.2 of this
addendum).
UV
Lamp
PMT
UV Source
Optical Filter
(214 nm)
Fluorescent UV
Optical Filter
(360 nm)
UV Source
Lens
PMT Lens
Reference
Detector
Window Seal
Sa
m
p
l
e
Gas
IN
Sample Gas OUT
Broadband
UV From
Lamp
Fluorescent
UV
Only
Focused
Fluorescent
UV
Collimated
Excitation UV
Reflected
Excitation UV
and
Fluorescent UV
SO
2
Beam
Splitter
Figure 9-1: UV Light Path
07265A DCN6038