2 Rosemount Analytical
FEATURES AND
APPLICATIONS
Rosemount Analytical sets a new industry standard
for the life expectancy of pH and ORP sensors with
the introduction of our TUpH Sensors. These low
maintenance, disposable sensors offer long life and
high performance in the measurement of pH in aque-
ous solutions in pipelines, open tanks or ponds.
The TUpH Sensors feature a patented large area
polypropylene reference junction for maximum resist-
ance to process coatings, generally found in dirty, high
solid applications. In addition, the patented secondary
helical reference pathway serves as added protection
from poisoning ions.
Our TUpH Sensors also feature a standard 1 in. outer
diameter for versatile mounting in flow through, inser-
tion or submersion pH and ORP applications.
The Model 396 Sensor is
specifically designed for
improved life in harsh, dirty,
and abrasive applications
such as lime slurry waste
treatment, paper machine
headbox and pigment/dye applications, where large
quantities of suspended solids are present.
The Model 396 is available with custom glass elec-
trodes, optional flat or standard hemi glass pH bulb,
to best meet your application needs. Flat glass is
advantageous in abrasive or coating applications that
etch or build up on glass respectively. In coating appli-
cations, such as slurries, the flat surface allows the
process flow to act as a scrubbing agent to reduce
coating and maintenance whereas in abrasive appli-
cations pitting from silicates and other similar materi-
als is minimized by the flat surface to provide longer
life. The hemi bulb is ideal for general purpose use
and for those processes requiring greater accuracy
over the entire pH range.
The sensor is housed in a stainless steel body with
EPDM seals. The simplified construction, designed
with user convenience in mind, does not require elec-
trolyte replenishment or any component replace-
ment. The Model 396 also features a large glass bulb
for increased resistance to high temperature and
other effects of aging for longer life.
The Model 396 is not available with an integral pre-
amplifier. The preamplifier must be in a remote loca-
tion or integral to the analyzer/transmitter. Therefore,
the Model 396 is compatible with all Rosemount
Analytical and other manufacturers’ instruments.
The Model 396P Sensor is
specifically designed for improved
life in harsh, dirty applications,
such as sour water waste treat-
ment and scrubbers, where a high
performance, low maintenance,
disposable sensor is required.
The sensor is available in two configurations: the stan-
dard shrouded tip, in which the pH glass is completely
recessed within the reference junction for abrasive or
rough applications, and the optional slotted tip with a
partially exposed pH glass for viscous or low flow
applications.
The Model 396P features a titanium solution ground,
constructed in an annular design around the pH/ORP
electrode. The solution ground provides advanced
sensor diagnostics for preventative maintenance when
used with the Models 54 pH/ORP analyzer, 1054B
pH/ORP analyzer, and 3081 pH/ORP transmitter. In
addition, the Model 396P sensor can be used with
most non-diagnostic Rosemount Analytical and other
manufacturers’ instruments.
The sensor is housed in a molded polypropylene body
with EPDM seals, making it virtually indestructible and
chemically resistant. Complete encapsulation elimin-
ates leakage or high humidity problems traditionally
found in other pH/ORP designs. The simplified con-
struction, designed with user convenience in mind,
does not require electrolyte (KCl) replenishment or
any high maintenance troubleshooting procedures.
The Rosemount Analytical Model 396P is available
with an optional integral preamplifier to convert the
high impedance pH or ORP mV signal into a stable,
noise-free signal with transmission capability of up to
three miles.
Percent Linearity
396 396 396P 396R
pH Range GPHT Hemi GPHT Flat GPLR Hemi GPLR Hemi
0-2 pH 94% 95% 94% 94%
2-12 pH 99% 99% 97% 97%
12-13 pH 97% 96% 98% 98%
13-14 pH 92% _ 98% 98%
