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SECTION 1.0
DESCRIPTION AND SPECIFICATIONS
1.1 TUpH™ FEATURES AND APPLICATIONS.
Rosemount Analytical has achieved a new industry
standard for the life expectancy of pH sensors with
the TUpH Sensors. The low maintenance, disposable
Models 396, 396VP, 397, 398, and 398VP TUpH
Sensors offer long life and high performance in the
measurement of pH in aqueous solutions in pipelines,
open tanks, or ponds. These TUpH sensors feature a
patented, large area reference junction
1
for maximum
resistance to process coatings, generally found in
dirty, high solid applications. In addition, the second-
ary helical reference pathway
2
serves as added pro-
tection from poisoning ions. The simplified construc-
tion, designed with user convenience in mind, does
not require electrolyte replenishment or any compo-
nent replacement. All models feature a large glass
bulb for increased resistance to the effects of aging
for longer life. All models are available only without an
integral preamplifier. The preamplifier must be in a
remote location or integral to the analyzer/transmitter.
Models with a “VP” after the model number indicate
the variopol connector is used on the sensor in place
of the cable. In this case, a separate cable with a mat-
ing VP connector must be used. All models are com-
patible with all Rosemount Analytical and most manu-
facturers instruments.
The entire line of TUpH model sensors now incor-
porate the new SILCORE technology contaminant
barrier. This triple-seal barrier prevents moisture and
material impurities from migrating to the pH sensor’s
reference electrode’s metal lead wire. By preventing
these contaminants from compromising the integrity of
the pH measurement, sensor life is increased, espe-
cially at higher temperatures where increased migra-
tions occur. In addition, the SILCORE
4
technology pro-
vides added protection against sensor failure due to
vibrations and shock by transferring damaging energy
away from the glass-to-metal seal.
1.1.1 Model 396 and 396VP TUpH
Features and Applications.
The Models 396 and 396VP
TUpH sensors are construct-
ed of polypropylene and stain-
less steel and is completely
sealed by EP (ethylene propy-
lene) to eliminate process
intrusion. It is specifically
designed for improved life in harsh, dirty applications
such as lime slurry waste treatment and paper
machine headbox and pigment/dye applications where
large quantities of suspended solids are present.
Installation is easily achieved through a wide variety of
mounting configurations. The Model 396 features an
optional front or rear 1 in. MNPT process connection
for insertion, submersion, or flow through applications.
1.1.2 Model 397 TUpH and
Quik-Loc
3
Features and
Applications. The Model 397
is housed in a highly chemical
resistant polypropylene body
and completely sealed with
EP to eliminate process intru-
sion. The Model 397 body is
specifically designed for use with the Quik-Loc Kit
which consists of an adapter and coupler. The PEEK
(polyetheretherketone) adapter enables the Model 397
sensor to fit into a 1 in. MNPT Dixon coupler for quick
and easy removal without sensor cable twisting. The
316 stainless steel DIxon coupler is sealed with EP and
features locking arms. The Quik-Loc Kit is not recom-
mended for use in processes with hazardous, corro-
sive, or strong oxidizing chemicals due to a risk of spray
and bodily hazards.
1.1.3 Model 398 and 398VP TUpH
Features and Applications.
The chemical-resistant con-
struction of Tefzel, titanium,
and the patented TUpH refer-
ence junction make the
Models 398 and 398VP the
ideal sensors for measuring
pH in harsh process liquids.
Use Model 398 or 398VP to measure pH in sour water
strippers, in pulp bleaching towers that use chlorine
dioxide, and in process streams containing a variety of
organic solvents.
Models 398 and 398VP use the highest quality mate-
rials to provide superior chemical resistance. The sen-
sors are housed in a titanium tube and features an
optional 1 inch MNPT process connector for insertion,
submersion, or flow-through applications. The molded
Tefzel TUpH construction is offered with a choice of
seals (Viton, EPDM, or Kalrez). Combining high qual-
ity materials with the TUpH reference technology and
ACCUGLASS
4
pH bulb allows for ultimate chemical
resistance and makes Models 398 and 398VP the
perfect choice for measuring pH in harsh, demanding
processes.
1
May be Protected by U.S. Patent No. 5, 152, 882, Foreign Patent Pending
2
Protected by U.S. Patent No. 6, 054, 031, Foreign Patent Pending
3
Protected by U.S. Patent No. 6, 000, 290, Foreign Patent Pending
4
A
CCUGLASS and Silcore are registered trademarks of Rosemount Analytical
MODEL 396/396VP/397/398/398VP SECTION 1.0
DESCRIPTIONS AND SPECIFICATIONS
1