Model 9190 pages

WESTERN RESEARCH

®

PROCESS INSTRUMENTS

Model 919 Hot/Wet Single Gas Analyzer
Benefits
t High reliability and reduced
maintenance requirements
through a no-moving-parts
design
t Hot/wet analysis prevents errors
associated with:
—Correcting for water vapor
—Absorption losses in driers
t Accuracy better than 2.5 ppm
SO2
t Able to measure SO2, NO, NO2,
H2S, NH3, or a number of other
chemicals
t No H2O or CO2 interference
t Automated zero and span gas
calibration
t Provides serial interface with
plant DCS

The Need
The AMETEK Process Instruments
Model 919 has been specifically
designed to meet the requirements
of the most challenging process and
emissions monitoring applications in
a cost-effective fashion. The Model
919 is a UV-based photometric
analyzer capable of measuring any
one of hundreds of UV-absorbing
compounds. The 919 is a complete
system with a sample extraction
and transport system designed to
maintain sample integrity. Housing
options for the analyzer unit include
a cabinet or walk-in shelter built to
client specifications.
t The simple and robust design of
the Model 919 is complemented by
powerful data processing capabilities.
Both analog and digital outputs are
available with serial communications
via Modbus protocol being an
available option. An optional oxygen
sensor can be included.
t In process and emission streams,
as a stand-alone system from probe
to output, the Model 919 is the
standard of excellence and versatility.

The Measurement
The Model 919 uses our proprietary
high resolution UV technology
in a dual beam configuration.
Resolution better than 0.02 nm
is provided by high intensity, line
source lamps. These sources emit
at a fixed wavelength providing
great measurement stability, and
emit low total power removing the
potential for sample photolysis. The
high resolution enables unparalleled
linearity over a wide dynamic range
which, in turn, leads to simple,
robust data analysis. The dual beam
configuration, combined with the
reference measurement, ensures
low noise performance with minimal
baseline and span drift.
t UV measurements do not suffer
from H2O and CO2 interference as
these species are transparent in the
UV. This greatly simplifies sample
handling. The Model 919 is a fully
extractive, heated wet-basis analyzer.
The sample cell and all components

in contact with the sample are heated
above the dew points of all gases in
the sample stream. This results in a
simpler and more accurate calculation
of gas concentrations requiring
no corrections for condensed and
dissolved components. It also results
in a simpler analytical system as there
is no need for sample drying. The
Model 919 has built-in zero and span
calibration and four zone temperature
control.

Typical Applications
t CEM applications in:
—Sulfur plants
—Smelters
—Coal, oil, and gas-fired power
plants
—Industrial boilers and process
heaters
t Non-CEM applications in:
—SRU feed gas monitoring
—H2S monitoring in contactor
overheads

Model 919 Single Gas Analyzer

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