Model 241 CE II0 pages

WESTERN RESEARCH

®

PROCESS INSTRUMENTS

Model 241CE II Hydrocarbon Dew Point
Analyzer
Superior Benefits
tAccurate and objective direct
measurement of hydrocarbon
dew point temperature at pipeline
pressure or Cricondentherm
tProprietary three-stage sample
filter provides superior
protection
tDesigned for unattended
operation with low maintenance
tElectricity the only consumable
tCompact design allows mounting
in optional enclosures

The Need
Natural gas producers, distributors,
and industrial consumers understand
the importance of ensuring that
natural gas meets various strict
quality specifications which typically
include a maximum hydrocarbon dew
point temperature. Even relatively
small quantities of liquids in natural
gas transmission lines can damage
sensitive metering equipment, plug
lines, interfere with odorants, and
most importantly, create unsafe
conditions. Liquid drop out is not only
an operational and safety concern,
but may also result in errors in other
critical measurement equipment.
Hydrocarbon liquids in natural gas
delivered to end-users can cause
damage to gas turbines, upset
plants using natural gas as chemical
feedstock, increase emissions from
burners, and compromise safety.
t In many applications, automated
on-line analyzers, such as the Western
Research 241CE II Hydrocarbon Dew
Point Analyzer, are replacing manual
chilled mirror devices or calculation
methods, which have traditionally
been used to determine hydrocarbon
dew point temperature. For over 15
years, AMETEK Western Research
has provided an accurate and low-

maintenance analyzer for automated
direct measurement of hydrocarbon
dew point temperature in natural gas
streams, using a patented chilled
mirror design.

Direct Measurement
The Model 241CE II Analyzer uses a
thermoelectric cooler to control the
temperature of a two-surface mirror.
During each measuring cycle. the
microcontroller cools the mirror at a
controlled rate until the optics have
detected changes in light intensity that
occur when liquids condense on the
two surfaces of the mirror. Differences
in surface tensions between liquid
hydrocarbons and other condensables
enable the analyzer to reject nonhydrocarbon dew points. This
ability along with sensitive optics
and a precisely
controlled cooling
rate provides
improved accuracy
and repeatability
compared to a
manual chilled
mirror type device
which depends
on the training
of the operator.
The temperature
of the mirror in
the 241CE II is
measured using
a Platinum RTD
which provides
higher accuracy
and long term
stability compared
to thermocouples.
t The Model
241CE II is
designed for
unattended
operation, in
a complete
package, without
the need for

additional remote controllers, or costly
sample systems. It carries CSA and
ATEX certification for use in hazardous
areas using an EEx d (flameproof) type
enclosure. Sample gas flows through
a measuring cell mounted on the
outside of the flameproof electronics
enclosure which simplifies sample
system maintenance.
t A fully integrated sample system
package, including proprietary
multiple stage filtration specifically
designed for natural gas samples,
protects the analyzer from common
natural gas contaminants (aerosols,
particulates and liquid slugs) and
ensures reliable, fast, and accurate
means of detecting the hydrocarbon
dew point temperature in natural gas
applications.

Model 241CE II Hydrocarbon Dew Point Analyzer - European
version shown on backpan. Analyzer must be installed in an
environmentally controlled building or shelter.

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