SRI FPD DETECTOR
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Bandpass Filters for Sulfur or
Phosphorus |
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Simultaneous Sulfur and Phosphorus
Detection with the Dual FPD |
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Detects Sulfur Compounds to 200ppb,
Phosphorus Compounds down to 10ppb |
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Simultaneous Hydrocarbon Speciation with
the FPD/FID or Dual FPD/FID |
The FPD
detector is similar to the FID except that the
detector body is completely light tight and a
second flow of hydrogen purges the optical path
between the photomultiplier tube ( PMT ) and the
hydrogen-rich flame. A bandpass filter at 393nm.
for sulfur or 525nm. for phosphorus mounts in
front of the PMT so only the emissions from
sulfur or phosphorus are detected while other
wavelengths are rejected. |
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While not 100% selective, the FPD is 100,000
times more sensitive for S-P compounds than for
hydrocarbons. Sulfur compounds such as H2S or
SO2 can be detected down to about 200 ppb and
phosphorus to 10ppb. The phosphorus response is
linear, but the sulfur response is exponential (
twice the sulfur yields four times the peak area
).
The dual FPD
detector is equipped with two PMTs which allow
simultaneous detection of sulfur and phosphorus,
and either the single or dual FPD can be
equipped with an FID collector electrode and
electrometer which will detect the hydrocarbon
peaks at the same time as the PMTs are
responding to the S-P compounds.
The FID
response is not as sensitive as a pure FID
because the hydrogen-rich flame required for
optimum S-P detection is not optimum for best
hydrocarbon response. Users can easily optimize
S-P response versus hydrocarbons response by
simply adjusting the hydrogen/air mixture using
the included EPC gas controls.
Click here
for printable FPD technical overview (.pdf).
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#SRI-8690-0080,
FPD DETECTOR |
$4,119.00 |
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#SRI-8690-1080,
FPD/FID DETECTOR |
$5,149.00 |
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#SRI-8690-0085,
DUAL FPD
WITH SULFUR AND PHOSPHOROUS FILTERS |
$8,239.00 |
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#SRI-8690-2085,
DUAL FPD
WITH SULFUR AND PHOSPHOROUS FILTERS
AND FID ELECTRODE |
$9,269.00 |
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