Model 9100 pages

WESTERN RESEARCH

®

PROCESS INSTRUMENTS

Model 910 Hot/Wet Multi-Gas CEM
Benefits
►t Hot/wet analysis prevents errors
associated with:
t

— Correcting for water vapor

— Absorption losses in driers

►t Multi-component gas analysis
(up to five species)
►t Multi-range SO2 measurement
►t Independent NO and NO2
measurement
►t No H2O or CO2 interference
►t Automated zero and span gas
calibration
►t Provides serial interface with
plant DCS
►t Incorporates flow measurement
for emission rate calculations

Introduction
The Model 910 is a version of the
Model 920 specifically configured
for monitoring stack emissions on
a mass rate basis. The standard
configuration measures stack effluent
temperature and velocity in addition
to pollutant concentrations at stack
conditions, enabling mass emission
rates to be reported. With the addition
of an optional zirconium oxide
sensor, the Model 910 is capable
of monitoring oxygen and providing
oxygen-corrected measurements.
t The Model 910 is a multi‑component
analyzer capable of measuring up to
five different gases simultaneously.
The Model 910 is a complete
system with a sample extraction
and transport system designed for
maintaining sample integrity. Housing
options for the field unit include a
cabinet or walk‑in shelter built to your
specifications.
t The Model 910 performs analyses
typically requiring two or more
separate analyzers, making it an
economical alternative when several
gases must be monitored. The
Model 910 performs all necessary
sample gas and calibration gas flow

management, and probe and sample
line temperature control. The Model
910 is a full-function continuous
emissions monitoring system (CEM)
which requires the addition of only a
sample probe and sample line to be
fully operational.

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 910 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
or conditioning. The Model 910 has
built‑in zero and span calibration and
four zone temperature control.

The Measurement
The Western Research® Model 910
uses our proprietary high resolution
UV technology in a dual beam,
multiple wavelength 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
(less than 1% deviation over 4 to
5 orders of magnitude) which, in
turn, leads to simple, robust data
analysis. A six‑position filter wheel
enables one reference and five
measure wavelengths. The dualbeam configuration, combined with
the reference measurement, ensures
low noise performance with minimal
baseline and span drift.

Applications
►t CEM applications in:
t

— Sulfur plants

— Smelters

— Coal, oil, and gas-fired power t
plants

— Industrial boilers

Model 910 Hot/wet Multi-Gas CEM

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