TUpH REFERENCE TECHNOLOGY ENSURES
LONG LIFE in processes that coat, foul, and poison
most other electrodes.
• Large Surface Area reference junction
• Helical Reference Pathway
• SILCORE™
1
Contaminant Barrier
SUPERIOR CHEMICAL RESISTANCE to tackle
the most aggressive applications, even CHLORINE
DIOXIDE in pulp bleaching towers.
• TITANIUM and TEFZEL
®2
sensor construction
• PEEK internal construction
• Choice of KALREZ
®2
or VITON
®2
seals
RESISTS ATTACK BY MOST ORGANIC SOLVENTS
FEATURES AND APPLICATIONS
The TUpH large area reference junction for minimal maintenance requirements: The reference junc-
tion provides an electrical connection between the reference electrode and the sample, and helps maintain
a stable reference potential, regardless of the change
in sample pH. The TUpH reference electrode junction,
the entire plastic tip surrounding the glass pH electrode, maintains a steady reference signal even in the
dirtiest of applications because it resists plugging (a
common cause of pH signal drift). This large reference
junction area is made of micron sized reference pathways used for ionic exchange so it resists plugging by
large particles and will continue to send a steady pH
signal, even in the dirtiest of applications. The TUpH
reference junction technology has been field-proven
for minimum maintenance requirements.
The TUpH helical reference pathway stops reference poisoning. Ions diffuse through the reference
pathways and a charge is passed to the reference
element. The reference element must be protected
from contamination by poisoning ions such as sulfide,
mercury, cyanide, and ammonia or else the pH signal
will drift. The TUpH sensor's long internal helical
reference pathway hinders and slows down the rate
of contaminants migrating to the reference element
thereby providing a longer sensor life. This essential
component is constructed of PEEK thermoplastic,
one of the most durable materials available.
The entire line of TUpH model sensors now incorporate the new SILCORE technology contaminant
barrier. This triple-seal barrier prevents moisture and
material impurities from migrating to the reference
electrode’s lead wire. By preventing these contaminants
from compromising the integrity of the pH measurement, sensor life is increased, especially at higher
temperatures. In addition, the SILCORE technology
provides added protection against sensor failure due
to vibrations and shock by transferring damaging
energy away from the glass-to-metal seal.
1
TUpH, ACCUGLASS, and SILCORE are trademarks of Rosemount Analytical.
2
Tefzel, Kalrez, and Viton are registered trademarks of DuPont Performance
Elastomers.
Models 398 and 398R
pH/ORP Sensors
Product Data Sheet
PDS 71-398/rev.F
October 2010
MODEL 398
INSERTION/SUBMERSION
DESIGN allows for variable insertion
depths and simple sensor removal
without cable twisting
MODEL 398R
RETRACTABLE DESIGN allows sensor to
be removed for calibration and maintenance
without process shutdown
Measured Range:
ORP: -1500 to 1500mV
pH: GPHT hemi bulb or GPLR flat bulb -
ACCUGLASS, 0 - 14 pH
Percent Linearity Over pH Ranges:
Reference: Permeable Tefzel with secondary helical
pathway
Wetted Materials: Titanium, Tefzel, glass, platinum
(ORP only), and choice of Viton or Kalrez
Process Connections: NONE
Must use 1 inch compression process connector
(PN 23166-00 or 23166-01).
Also, Model 398R can be inserted through a ball
valve
Cable: Standard integral 15 ft , optional 9.5 in. (for
Model 398R only);
Recommended Interconnect: PN 9200273
Maximum Process Pressure and Temperature:
250 psig (1825 kPa [abs]) at 212°F (100°C)
Maximum Pressure at Retraction or Insertion
(Model 398R only):
64 psig (524 kPa [abs]) Code 21
35 psig (343 kPa [abs]) Code 25
Minimum Conductivity: 75 µS/cm, nominal 100 µS/cm
Weight/Shipping Weight:
Model 398 sensor: 1.0 lb/2.0 lb (0.45 kg/0.9 kg)
Model 398R sensor:
Code 21; 2.0 lb/3.0 lb (0.9 kg/1.40kg)
Code 25; 3.0 lb/4.0 lb (1.40 kg/1.80kg)
*unless otherwise specified
pH range Hemi Bulb Flat Bulb
0-2 pH 94% 93%
2-12 pH 99% 98%
12-13 pH 97% 95%
13-14 pH 92% —
The ACCUGLASS1pH bulb means the Models 398
and 398R resist cracking and have near theoretical
response even at extreme pH values. A slotted tip
surrounding the glass bulb provides additional protection against breakage. The sensor can be oriented
with the bulb directly in the stream, or it can be turned
ninety degrees, permitting the shroud to protect the
glass bulb from particles.
The TUpH™ reference junction and helical pathway
combined with the AccuG
LASS pH glass performs
exceptionally well in dirty, high solid applications and
requires only minimum maintenance. This is the toughest pH sensor on the market and is still unmatched by
all other pH sensors.
The chemical-resistant construction of Tefzel
®
2
,
titanium, and the TUpH reference junction makes
Models 398 and 398R the ideal sensors for measuring
pH in harsh process liquids. Use Models 398 and 398R
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.
All TUpH sensor models have been 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. Various sensor materials, depending on the
sensor model, is available for a variety of different
application needs.
Models 398 and 398R are housed in a titanium tube.
The molded Tefzel
®
2
TUpH construction is offered
with a choice of seals (Viton
®
2
or Kalrez
®
2
).
Combining high quality materials with the TUpH reference technology and ACCUGLASS pH bulb allows for
ultimate chemical resistance and makes Models 398
and 398R the perfect choice for measuring pH in
harsh, demanding processes.
Models 398 and 398R are available with 15 ft. of
cable for wiring directly to an analyzer/transmitter or
a remote junction box. The Model 398R retractable
sensor is also available with 9.5 in. of cable for use
with a sensor head junction box which attaches to the
sensor tube via a compression fitting.
A preamplifier converts the high impedance pH
signal into a stable, noise-free signal and must be
used with all pH sensors. The preamplifier can be in a
remote junction box or integral to the analyzer/transmitter. All TUpH Sensors are compatible with all Rosemount
Analytical and other manufacturers' instruments.
1
TUpH, ACCUGLASS, and SILCORE are trademarks of Rosemount Analytical.
2
Tefzel, Kalrez, and Viton are registered trademarks of DuPont Performance
Elastomers.
PERFORMANCE AND PHYSICAL SPECIFICATIONS FOR MODELS 398 AND 398R*
2 Rosemount Analytical
JUNCTION BOX IS OPTIONAL
Rosemount Analytical 3
Typical Mounting Details - Model 398R Retraction Version
Note: Sensor must be mounted at an angle between 10° and 90° above the horizontal.
Pipe tees and weldalets provided by customer.
4 Rosemount Analytical
Recommended Flow-Through and Insertion Installation for Model 398
1-1/2 inch Pipe Tee (PN 2002011) with 1 inch threaded connections
Insertion Installations for Model 398
Model 398 can be inserted into a tee, such as the one shown here (PN 2002011, 1-1/2 in. tee with 1 in. threaded process
connection), for angle or straight process flow. Other tees are available; see page 9 for part numbers.
PN 2002011
MILLIMETER
INCH
Submersion Installations for Model 398
Model 398 can be submersed in ponds or tanks in various ways, including a customer-supplied pipe mount set-up using PN
9330022 pipe mount union. Also the Handrail Mounting Assembly PN 11275-01 can be used and includes all necessary parts to
mount the sensor at the end of a pipe using a process connector (PN23166-00 or 23166-01).
Dimensional Drawing - Model 398 Insertion/Submersion Sensor
The process connector can be placed onto Model 398 with the threads facing down for insertion mounting into a tee or the threads
facing up for a submersion pipe mount connection. See page 9 for photos of sensor with the process connector.
Rosemount Analytical 5
PN 9320057
6 Rosemount Analytical
INCH
MILLIMETER
Dimensional Drawing — Model 398R with and without Optional Ball Valve PN 23765-00
Note: Add five (5) inches to dimension A if mounting a sensor head junction box onto the sensor.
Rosemount Analytical 7
Dimensional Drawings of Model 398R shown with and without 1-1/2 in. Ball Valve PN 23240-00
For the ball valve installation shown, the ball valve kit (PN 23240-00) and
1 in. x 1 in. process connector (PN 23166-00 or 23166-01) must be purchased separately.
Note: Add five (5) inches to dimension A if mounting a sensor-head junction box onto the sensor.
DWG. NO. REV.
40396R05 A
Ball Valve Kit (PN 23240-00) used
with Model 398R retractable sensor
A process connector (PN 23166-
00 or -01) must be used to con-
nect the sensor to Ball Valve Kit
23240-00. Process connector can
be purchased separately.
MILLIMETER
INCH
The Model 398 Sensor, housed in a titanium tube and made with a patented Tefzel
reference junction, can be used with a 1 inch MNPT process connector (purchased
separately). The sensor is available with a hemi bulb glass pH electrode or a platinum and glass ORP electrode and with Pt100 or 3K temperature compensation.
The 398 is provided with a standard 15 ft cable. A preamplifier must be used if the
sensor is more than 15 ft from the analyzer/transmitter. Junction box kits with preamplifiers must be ordered separately. Process connector must also be ordered
separately.
CODE MEASURING ELECTRODE TYPE (Required Selection)
10 GPHT hemi glass, General Purpose High Temperature (0-14 pH)
12 ORP
CODE ANALYZER/TC COMPATIBILITY (Required Selection)
50 For Models 1181 (3K TC)
54 For Models 1054A/B, 1055, 2081,54/54e, 81, 3081, 4081, 5081, Xmt, SCL-(P/Q) (PT 100 RTD)
CODE O-RING MATERIAL (Required Selection)
30 EPDM
31 Viton
32 Kalrez (recommended for applications with Chlorine Dioxide)
CODE OPTIONAL SELECTIONS (see drawings below)
62 15 ft Cable, no BNC (Not valid w/Option 50) for wiring directly to 1055, 54/54e, 81, 3081, 4081, 5081, Xmt Transmitter/Analyzers
MODEL
398 TUpH INSERTION/SUBMERSION TITANIUM pH SENSOR
398 - 10 - 32 - 54 EXAMPLE
8 Rosemount Analytical
Wire Configuration for Standard Option
Wire Configuration for Option -62
1. Process Connector Accessories (required for all first time installations with 1-inch process Weight/Shipping Weight
connection threads)
Choose one: PN 23166-00, 316 SST, 1 in. x 1 in. NPT process connector, 0.5 lb (0.3 kg)/1.0 lb (0.5 kg)
with EPDM o-ring
PN 23166-01, Titanium, 1 in. x 1 in. NPT process connector, with EPDM o-ring 0.5 lb (0.3 kg)/1.0 lb (0.5 kg)
PN 9510066, Nylon, 1 in. x 1 in. NPT process connector (submersion only) 0.5 lb (0.3 kg)/1.0 lb (0.5 kg)
Choose one (optional process connector o-rings)
PN 9550220, Kalrez o-ring, 2-214 0.1 lb (0.05 kg)/1.0 lb (0.5 kg)
PN 9550099, Viton o-ring, 2-214 0.1 lb (0.05 kg)/1.0 lb (0.5 kg)
2. Mounting Accessories (optional)
Choose one: PN 915240-03 PVC flow through tee, 3/4 in. NPT process connection 1.0 lb (0.5 kg)/1.5 lb (0.7 kg)
PN 915240-04 PVC flow through tee, 1 in. NPT process connection 1.0 lb (0.5 kg)/1.5 lb (0.7 kg)
PN 915240-05 PVC flow through tee, 1 1/2 in. NPT process connection 1.0 lb (0.5 kg)/1.5 lb (0.7 kg)
PN 11275-01 Sensor handrail mounting assembly 15 lb (6.8 kg)/17 lb (7.7 kg)
PN 2002011 1-1/2 in. CPVC Tee with 1 in. FNPT connection 1.0 lb (0.5 kg)/1.5 lb (0.7 kg)
PN 23728-00 Low Flow Cell, acrylic 1.0 lb (0.5 kg)/1.5 lb (0.7 kg)
3. Remote Junction Boxes (optional, recommended for sensor to analyzer distances of more than 15 ft)
Choose one: PN 23555-00 includes preamplifier for Models 54, 81, 3081, 4081 1.3 lb (0.6 kg)/2.0 lb (1.0 kg)
PN 23309-03, uses PN 22698-02 plug-in preamplifier (purchased separately) 1.3 lb (0.6 kg)/2.0 lb (1.0 kg)
for Model 1181 Analyzer
PN 23309-04, uses PN 22698-03 plug-in preamplifier (purchased separately) 1.3 lb (0.6 kg)/2.0 lb (1.0 kg)
for Models 1054 series, 2054, 2081 Analyzers
PN 23054-03 includes preamplifier for Solu Cube Model 2700 3.1 lb (1.4 kg)/4.0 lb (2.0 kg)
4. Extension cables (used with remote junction boxes)
Choose one: PN 23646-01, 11 conductor, shielded, prepped 0.5 lb/ft (0.3 kg/ft)/
1.0 lb/ft (0.5 kg/ft)
PN 9200273, 11 conductor, shielded, unprepped 0.5 lb/ft (0.3 kg/ft)/
1.0 lb/ft (0.5 kg/ft)
5. Wiring Aids
Choose one: PN 9120531 BNC splitter, used in place of option -62 or BNC coax prepping
for connections to junction box (PN 23555-00); Models 1181, 1054, 2081,
54, 81, 3081, 4081; SoluComp (SCL-P-014); and Model 2700
Preamplifier (PN 23054-03)
NONE: No wiring aids required for connections to preamplifier PN 22698-02,
preamplifier PN 22698-03, or Models 1054A, 1054B, and 2054
FOR FIRST TIME MODEL 398 INSERTION OR SUBMERSION INSTALLATIONS, ROSEMOUNT
ANALYTICAL RECOMMENDS USING THE FOLLOWING GUIDE:
Rosemount Analytical 9
Metal Process Connector PN 23166-xx (xx = 00 for 316 SST
and xx = 01 for titanium) can be used for insertion or sub-
mersion Model 398 sensor connection to 1-inch tee fittings. It
also must be used to connect Model 398R to ball valve PN
23240-00 or directly to the process.
The metal process connector gives the sensor various insertions depths, depending on where the user
locates the compression fitting. Also the threads can
be switched to face the cable end of the sensor for
connection to submersion pipes.
ORDERING INFORMATION
The Model 398R Sensor, housed in a titanium tube and made with a patented Tefzel reference junction, can be
used with a ball valve (order separately) for hot tap applications. The sensor is available with a hemi bulb glass pH
electrode or a platinum and glass ORP electrode and with Pt100 or 3K temperature compensation. The 398R is
provided with a standard 15 ft cable and is offered with an optional 9.5 in. cable for easy wiring to sensor head
junction boxes. A preamplifier must be used if the sensor is more than 15 ft from the analyzer/transmitter. Junction
box kits with preamplifiers must be ordered separately. Process connector and ball valve assemblies must also be
ordered separately.
CODE MEASURING ELECTRODE TYPE (Required Selection)
10 GPHT hemi glass, General Purpose High Temperature (0-14 pH)
12 ORP
CODE SENSOR LENGTH (Required Selection)
21 21 in. Titanium Tube
25 36 in. Titanium Tube
CODE ANALYZER/TC COMPATIBILITY (Required Selection)
50 For Models 1181 (3K TC)
54 For Models 1054A/B, 1055, 2081,54/54e, 81, 3081, 4081, 5081, Xmt, SCL-(P/Q) (PT 100 RTD)
CODE O-RING MATERIAL (Required Selection)
30 EPDM
31 Viton
32 Kalrez (recommended for applications with Chlorine Dioxide)
Wire Configuration for
Standard Option and Code -60
Wire Configuration for Options -61 and -62
10 Rosemount Analytical
CODE OPTIONAL SELECTIONS (see drawings below)
60 9.5 in. Cable with BNC (for use with Model 1181, 1054 series, 2054, 2081 Sensor head junction boxes)
61 9.5 in. Cable no BNC (Not valid w/option -50) (for use with Model 54, 81, 3081 Sensor head junction boxes)
62
15 ft Cable, no BNC (Not valid w/Option 50) for wiring directly to 1055, 54/54e, 81, 3081, 4081, 5081, Xmt Transmitter/Analyzers
MODEL
398R TUpH RETRACTABLE pH SENSOR
398R - 10 - 21 - 32 - 54 EXAMPLE
ACCESSORIES
WEIGHT/SHIPPING WEIGHT
1. Retractable Mounting
A. Choose one (required for all first time installations without
ball valves or with 1-1/2 in. ball valve):
PN 23166-00, 1 in. MNPT process connector, Stainless 0.5 lb (0.3 kg)/1.0 lb (0.5 kg)
Steel with EPDM O-ring
PN 23166-01, 1 in. NPT process connector, Titanium with 0.5 lb (0.3 kg)/1.0 lb (0.5 kg)
EPDM O-ring
B. Choose one (Optional; Process Connector O-rings):
PN 9550220, O-ring, Kalrez, 2-214 0.1 lb (0.05 kg)/1.0 lb (0.5 kg)
PN 9550099, O-ring, Viton, 2-214 0.1 lb (0.05 kg)/1.0 lb (0.5 kg)
C. Choose one:
PN 23240-00, 1-1/2 in. ball valve assembly, 316 SST 6.0 lb (3.0 kg)/7.0 lb (3.5 kg)
(process connector required)
PN 23765-00, 1-1/4 in. ball valve assembly, 316 SST 6.0 lb (3.0 kg)/7.0 lb (3.5 kg)
2. Junction Boxes (Optional; Choose either Sensor Head or Remote)
A. Sensor Head Junction Boxes
(used with 9.5 in. cable length sensor)
Choose one:
PN 23709-00; includes preamplifier for Models 54, 81, 3081 3.3 lb (1.5 kg)/4.0 lb (2.0 kg)
PN 23708-01; includes preamplifier for Models 1054 series, 3.3 lb (1.5 kg)/4.0 lb (2.0 kg)
2054, 2081
PN 23707-00; includes preamplifier for Model 1181 3.3 lb (1.5 kg)/4.0 lb (2.0 kg)
B. Remote Junction Boxes (used with 15 ft cable length sensor)
Choose one:
PN 23555-00; includes preamplifier for Models 54, 81, 3081 1.3 lb (0.6 kg)/2.0 lb (1.0 kg)
PN 23309-03; uses preamplifier for Model 1181 1.3 lb (0.6 kg)/2.0 lb (1.0 kg)
PN 23309-04; uses preamplifier for Models 1054 series, 1.3 lb (0.6 kg)/2.0 lb (1.0 kg)
2054, 2081
PN 23054-03; includes preamplifier for SoluCube Model 2700 3.1 lb (1.4 kg)/4.0 lb (2.0 kg)
3. Wiring Configuration
(no option needed with remote junction
boxes - PN 23309-03, 23309-04, and 23555-00)
:
Choose one:
Order option -60 (standard with BNC connector) for PN 23707-00
or 23708-01 sensor head junction boxes (see diagram on page 6)
Order option -61 (no BNC) for PN 23709-00 sensor head
junction box (see diagram on page 6)
Order option -62 (no BNC) for PN 23550-00 and 23054-03
remote junction boxes (see diagram on page 6)
4. Extension Cables - Choose one:
PN 23646-01, 11 conductor, shielded, prepped 0.1 lb/ft (0.05 kg/ft)/1.0 lb/ft (0.5 kg/ft)
PN 9200273, 11 conductor, shielded, unprepped 0.1 lb/ft (0.05 kg/ft)/1.0 lb/ft (0.5 kg/ft)
Rosemount Analytical 11
FOR FIRST TIME INSTALLATIONS OF MODEL 398R RETRACTABLE SENSOR, ROSEMOUNT
ANALYTICAL RECOMMENDS USING THE FOLLOWING GUIDE
OTHER ACCESSORIES
PART DESCRIPTION WEIGHT/SHIPPING WEIGHT
22698-00 Preamplifier plug-in for remote junction box 0.1 lb (0.05 kg)/1.0 lb (0.5 kg)
(PN 23309-03), for Model 1003
22698-02 Preamplifier plug-in for remote junction box 0.1 lb (0.05 kg)/1.0 lb (0.5 kg)
(PN 23309-03), for Models 1181/1050
22698-03 Preamplifier plug-in for remote junction box 0.1 lb (0.05 kg)/1.0 lb (0.5 kg)
(PN 23309-04), for Models 1054A/B, 2054, 2081
22743-01 Pt100 Preamplifier for Model 1181 0.1 lb (0.05 kg)/1.0 lb (0.5 kg)
22744-01 3K Preamplifier for Model 1181 0.1 lb (0.05 kg)/1.0 lb (0.5 kg)
23557-00 Preamplifier for remote junction box (PN 23555-00), 0.2 lb (0.1 kg)/1.0 lb (0.5 kg)
for Models 54/3081/81
23550-00 Remote Junction box with extension board 3.3 lb (1.5 kg)/4.0 lb (2.0 kg)
9550167 O-ring, 2-214, EPDM for process connector 0.1 lb (0.05 kg)/1.0 lb (0.5 kg)
9550099 O-ring, Viton, for process connector 0.1 lb (0.05 kg)/1.0 lb (0.5 kg)
9550220 O-ring, Kalrez, for process connector 0.1 lb (0.05 kg)/1.0 lb (0.5 kg)
9210012 Buffer solution, 4.01 pH, 16 oz 1.2 lb (0.5 kg)/2.0 lb (1.0 kg)
9210013 Buffer solution, 6.86 pH, 16 oz 1.2 lb (0.5 kg)/2.0 lb (1.0 kg)
9210014 Buffer solution, 9.18 pH, 16 oz 1.2 lb (0.5 kg)/2.0 lb (1.0 kg)
2001492 Stainless Steel Tag, specify marking 0.1 lb (0.05 kg)/1.0 lb (0.5 kg)
Credit Cards for U.S. Purchases Only.
The right people,
the right answers,
right now.
ON-LINE ORDERING NOW AVAILABLE ON OUR WEB SITE
http://www.raihome.com
Specifications subject to change without notice.
Emerson Process Management
2400 Barranca Parkway
Irvine, CA 92606 USA
Tel: (949) 757-8500
Fax: (949) 474-7250
http://www.raihome.com
© Rosemount Analytical Inc. 2010
8
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