Hydrogen Sulfide and Sulfur Dioxide Analyzer 450i0 pages

Sou en gas ana yzer
a m b ir c et G a s A n a lly z e r

Pulsed fluorescence gas analyzer

Pro d uc t Speci f i cati o ns

Thermo Scientific Model 450i
Hydrogen Sulfide &
Sulfur Dioxide Analyzer

The Thermo Scientific™ Model 450i
Hydrogen Sulfide and Sulfur Dioxide
Analyzer utilizes pulsed fluorescence
technology.
•t Pulsed excitation and intensity
stabilization
•t Reflective bandpass filters
•t Temperature stabilization reaction
chamber
•t Stable, long-life UV source
•t Superior zero stability

The Thermo Scientific Model 450i analyzer
operates on the principle that H2S can be
converted to SO2. As the SO2 molecules
absorb ultraviolet (UV) light and become
excited at one wavelength, the molecules
then decay to a lower energy state emitting
UV light at a different wavelength.
Specifically,
H2S -> SO2
SO2 +hv 1 -> SO2*-> SO2 +hv 2
The pulsing of the UV source lamp serves
to increase the optical intensity whereby
a greater UV energy throughput and lower
detectable SO2 concentration are realized.
Reflective bandpass filters, as compared to
commonly used transmission fi lters, are less
subject to photochemical degradation
and are more selective in wavelength
isolation. This results in both increased
detection specificity and long term stability.

This state-of-the-art gas analyzer also offers
features such as an ethernet port as well as
flash memory for increased data storage.
Ethernet connectivity provides efficient
remote access, allowing the user to
download measurement information directly
from the instrument without having to be
on-site.
You can easily program short cut-keys to
allow you to jump directly to frequently
accessed functions, menus or screens. The
larger interface screen can display up to
five lines of measurement information while
primary screen remains visible.