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Model 396PVP is offered with a watertight sensor-to-
cable connector which eliminates re-wiring and cable
twisting when replacing sensors. The Variopol VP
multiple pin connector is an integral part of each sen-
sor model and uses a mating VP cable. Once the
cable is installed and wired to the analyzer, sensors
are easily replaced without replacing the cable, and, if
the replacement sensor is the same as its predeces-
sor, without rewiring the analyzer. Also the cable can
be disconnected from the sensor before removal from
the process which eliminates cable twisting.
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,
especially at higher temperatures where increased
migrations occur. In addition, the SILCORE technolo-
gy provides added protection against sensor failure
due to vibrations and shock by transferring damaging
energy away from the glass-to-metal seal.
The AccuG
LASS pH glass formulations exceed
industry standards. The AccuGlass pH glass is a
result of many years of glass research resulting in a
formulation which has been found to increase the life
of the sensor. Unlike other pH glasses presently on
the market, this glass resists cracking especially at
higher temperatures and reduces sodium ion error
commonly found in high pH applications. Overall, the
AccuGlass formulation enhances the sensor perform-
ance to measure pH more accurately and have a
longer sensor life than ever before.
AccuGlass and Silcore are trademarks of Rosemount Analytical.
1
MODEL 396P and 396PVP SECTION 1.0
DESCRIPTIONS AND SPECIFICATIONS
SECTION 1.0
DESCRIPTION AND SPECIFICATIONS
1.1 FEATURES AND APPLICATIONS
The Rosemount Analytical Model 396P and 396PVP
Sensors measure the pH or the ORP of aqueous solu-
tions in pipelines, open tanks, or ponds. It is designed
for harsh, dirty applications such as sourwater waste
treatment and scrubbers, where a high performance,
low maintenance, disposable sensor is required.
The combination electrode features a patented, large
area polypropylene reference junction for resistance to
process coatings, generally found in dirty, high solid
applications. The patented helical reference pathway
provides added resistance for poisoning applications.
In addition, it is available in two configurations:
glass/platinum electrode completely recessed within
the reference junction for added life in abrasive or
rough applications and the glass/platinum electrode
partially exposed for added life and accuracy in vis-
cous and low flow applications.
Both Models feature a titanium solution ground con-
structed in an annular design around the pH/ORP elec-
trode. The solution ground provides glass and refer-
ence sensor diagnostics for preventative maintenance
when used with the Model 54e, 1055, 5081, 3081,
4081, 81 pH/ORP, and Xmt-P transmitters. In addition
Models 396P and 396PVP can be used with most non-
diagnostic Rosemount Analytical and other manufac-
turer’s instruments.
Each sensor is housed in a molded polypropylene
body with EPDM seals, making it virtually indestructi-
ble and chemically resistant. Complete encapsulation
eliminates leakage or high humidity problems tradi-
tionally found in other pH/ORP designs. The simplified
construction, designed with user convenience in mind,
does not require electrolyte (KCl) replenishment or any
high maintenance troubleshooting procedures.
The Model 396P is offered with or without 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. A remote
preamplifier must be used with Model 396PVP.
Installation is easily achieved through the wide variety
of mounting configurations. The Models 396P and
396PVP feature 1 in. (MNPT) front and rear facing
connections for insertion, submersion or flow through
pH and ORP applications.