Rosemount Analytical Hx348, Gx448 Specifications

Steam Sterilizable Solutions Product Data Sheet

LIQ_PDS_Steam_Sterilizable/Rev.I December 2014

Dissolved Oxygen, pH, and Conductivity

Steam Sterilizable and Autoclavable Dissolved Oxygen, pH, and
Conductivity Sensors:

 Allows for fixed or retractable mounting configurations
 Measures accurately after many Steam-In-Place (SIP) application
 Requires minimal servicing
 Installs easily with quick cable-to-sensor disconnections
 Provides fast and stable readings

Sensor Mounting hardware designed for typical
biotechnology and pharmaceutical processes:

 Meets sanitary requirements
 Offers versatile mounting options
 Accepts sensors of various insertion lengths
 Installs with standard G 1–¼ inch weld-in socket

Analyzers and transmitters with many options:

 Two or four wire models
 Temperature compensation
 4–20 mA, HART®, or Fieldbus communications
 Sensor Diagnostic capabilities
 Plantweb alerts
 High/Low alarms
 PID Control
 Various mounting styles

 Enclosures for various safety levels

Features and Benefits

For many years, Emerson Process Management, Rosemount
Analytical has provided quality on-line instrusments and
sensors used in various industries. This complete line of
steam-sterilizable products caters to the most demanding
processes used in the Biotechnology, Pharmaceutical, and
Food & Beverage industries. Emerson Process Management’s
instruments and sensors are ideal for pH, dissolved oxygen, and
conductivity measurements for batch processes where steam­in-place sterilization is performed. The high-performance

sensors offer a long, stable life while requiring only minimal
maintenence. The various mounting accessories have been

specically designed to provide easy sensor access with either
xed weld-in or retractable mounting congurations. All

instruments offer a wide variety of features, allowing the user to
choose the best analyzer/transmitter for their individual process
needs.

Steam Sterilizable Solutions December 2014

Hx338 Steam Sterilizable and Autoclavable
Combination pH Sensor

The Hx338 sensor provides biotechnology and pharmaceutical
processes with the unique Tri-Triple reference technology. The
Tri-Triple reference is made up of three (3) separate peripheral liquid
junctions that make contact with the solution, and then two (2) inner

junctions that protect the reference. The rst junction eliminates
ow sensitivity and maintains a steady reference signal. The three

overall reference junctions work together to help maintain a drift-

free pH signal and ght poisoning ions (i.e. suldes, proteins, or

sugars), even after numerous sterilization cycles.

This sensor is also excellent for other applications, including chemical
reactions or food processing. The Hx338 can be used with the

Ordering Information

Model
Hx338

CODE Description

Temperature Compensation

CODE Description

9160494 1 m (3.3 f t), AS7 connector, bare wire on analyzer end

9160495 5m (16.4 f t), AS7 connector, bare wire on analyzer end

9160496 10m (32.8 f t), AS7 connectore, bare wire on analyzer end

9160497 1 m (3.3 f t), AS7 connector, BNC on analyzer end

9160498 3m (9.8 ft), A S7 connector, BNC on analyzer end

9160499 5m (16.4 f t), AS7 connector, BNC on analyzer end

9200338 S8 cable, free rotating connector, single connector, single pole 5m

9200339 S8 cable, free rotating connector, single connector, single pole 10m

23645-06 15 ft. (4.6m) cable with mating VP connector with BNC on transmitter end

23645-07 15 ft (4.6m) cable with matinig VP connector with bare wires on transmitter end

24281-00 15 ft. cable with mating VP8 connector

24281-01 25 ft. cable with mating VP8 connector

24281-02 2.5 ft. cable with mating VP8 connector

24281-03 50 ft. cable with mating VP8 connector

24281-04 100 ft. cable with mating VP8 connector

24281-05 4 ft. cable with mating VP8 connector

24281-06 10 ft. cable with mating VP8 connector

24281-07 20 ft. cable with mating VP8 connector

24281-08 30 ft. cable with mating VP8 connector

9160478 Insertion assembly 70mm insertion, use 120 mm sensor

9160477 Retractable assembly 70mm insertion, use 225 sensor

9160484 Service kit for insertion mounting assembly

9160486 Service kit for retractable mounting assembly

9160483 15 degree weld-in socket, G 1-1/4 in. thread, 44 mm

SQ 8940 1.5” Triclamp Insertion Assembly

2 RosemountAnalytical.com

pH Sensor

01 120 mm (4.725 in.)

02 225 mm (8.859 in.)

03 325 mm (12.796 in.)

04 400 mm (15.749 in.)

05 425 mm (16.733 in.)

72 PT100 with a VP connector (can be ordered with any length sensor)

PN Cable Accessories

PN Mounting Accessories

insertion or Retractable sensor mounting assemblies or similar
accessories with a PG 13.5 sensor connection, all of which can
be used with a large scale batch processes where steam-in-place
sterilization is performed. For smaller batch processes, it can be
threaded directly into the top plate and atuoclaved if necessary.

The 12mm diameter sensor is offered in ve different lengths for

various insertion depths. The sensor features a PG 13.5 thread for
simple process connection and a single-pole S7 connector plug for
quick disconnect from a mating cable. VP8 cable assembly works
with both VP6 and VP8 sensor connector (-72).

The Hx338 is a 12mm sensor offered
with PG 13.5 threads, a S7 connector

plug, and ve various insertion lengths.

The AS7 connector cable is offered in

various lengths and is terminated with

choice of BNC or bare wires.

The Weld-in Socket (see page 18) is
used to mount the Pressurized Mount­ing Assembly into tanks or pipes.

The Retractable Mounting Assembly
(see page 16) can be used with

Hx338-02 to achieve insertion and
removal of the sensor without shutting

down the process.

December 2014 Steam Sterilizable Solutions

Hx338 Steam Sterilizable and Autoclavable
Combination pH Sensor

Specifications

pH Range: 2 to 12 (0 to 14 for short periods)
Temperature Range: -14 to 275° F (-10 to 135° C)
Maximum Pressure: 58 psig (600 kPa abs, 4 bar)
Wetted materials: Glass, EPDM
Process Connections: PG 13.5 threads
Sensor Lengths: Choice of 120, 225, 325, 400, or 425 mm
Cable Connector: S7 connector plug, single pole, and VP

connector.
Cable Compatibility: any AS7 connector plug, single pole or S8
cable
PN 24281-06 VP8 connector, 10 ft cable
PN 24281-00 VP8 connector 15 ft cable
Compatible Mounting Accessory: Insertion or retractable
mounting assembly (see pages 15 and 16)
Compatible Analyzers: All Rosemount Analytical pH analyzers/
transmitters.

Sensor Dimensional Drawing

Sample Installation Drawing. A bench top fermentor (bioreactor,

5 L to 50 L) illustrating a top mount plate using the retractable
mounting assembly. Sensor can also be mounted directly into top
mount plate depending on port design.

Sample Installation Drawing. A pilot plant fermentor (bioreactor, 50

L to 500 L) illustrating a side mount conguration using a G 1-1/4

in., 15° weld-in socket and the retractable mounting assembly.
Note that these mounting assemblies can also be used with

dissolved oxygen sensors.

RosemountAnalytical.com 3

Steam Sterilizable Solutions December 2014

Hx348 Steam Sterilizable and Autoclavable
Combination pH Sensor

The Hx348 sensor provides a solution for difcult pH
measurements. This combination pH sensor offers the unique
Tri-Triple reference technology. The Tri-Triple reference is made up
of three (3) separate peripheral liquid junctions that make contact
with the solution, and then two (2) inner junctions that protect

the reference. The rst junction eliminates ow sensitivity and

maintains a steady reference signal. The three overall reference
junctions work together to help maintain a drift-free pH signal

and ght poisonous ions (i.e. suldes), even after numerous

sterilization cycles. Applications for this sensor can be found in the
biotechnology, pharmaceutical, and food processing industries.
The Hx348 pH sensor is a combination pH sensor that uses an S7
connector plug for quick disconnect from the cable. It is offered in

four (4) different insertion lengths in either a disposable or rellable

reference design.

Ordering Information

Model

HX348

CODE Sensor Insertion Lengths

CODE Sensor Design

pH Sensor

01 120 mm (4.73 in.)

02 150 mm (5.91 in.)

03 200 mm (7.88 in.)

04 250 mm (9.85 in.)

10 Disposable and pressurizable, Tri- Triple junction, recommended for use in media containing proteins

11 Rellable and pressurizable, single clog-free platinum junction, recommended for use in media containing suldes.

12 Rellable and pressurizable, Tri-Triple junction, recommended for use in media containing proteins.

The refillable sensor is ideal for critical measurements in difcult

applications – i.e., suldes, proteins, and sugars. It is offered with

either the Tri-Triple reference junction for use in media containing
proteins, or with a single, clog-free, platinum junction for use in

media containing suldes. The special electrolyte has been

developed to inhibit reference contamination.

The disposable sensor has been developed to allow simplicity of
use while still providing a stable pH signal over the long life of the
sensor.

Both the rellable and disposable sensors can be used with the

pressurized mounting accessory or a similar assembly.

The Hx348 is offered in four

different insertion lengths and can
be mounted in process using a
Pressurized
Mounting Assembly (see page 17).

PN Cable Accessories

9160494 1 m (3.3 ft), AS7 connector, bare wire on analyzer end

9160495 5m (16.4 ft), AS7 connector, bare wire on analyzer end

9160496 10m (32.8 ft), AS7 connectore, bare wire on analyzer end

9160497

9160498 3m (9.8 ft), AS7 connector, BNC on analyzer end

9160499 5m (16.4 ft), AS7 connector, BNC on analyzer end

9200338 S8 cable, free rotating connector, single connector, single pole 5m

9200339 S8 cable, free rotating connector, single connector, single pole 10m

9160479 Pressurized Assembly for 120 mm electrode, 70 mm insertion

9160480 Pressurized assembly for 150 mm electrode, 100 mm insertion

9160481 Pressurized assembly for 200 mm electrode, 150 mm insertion

9160482 Pressurized assembly for 250 mm electrode, 200 mm insertion

9160483 15 degree weld-in socket, G 1-1/4 in. thread, 44 mm

9160485 Service kit for pressurized mounting accessory

9160500 500 ml rell solution for code -11 sensors only

9160505 100 ml rell solution for code -12 sensors only

1 m (3.3 ft), AS7 connector, BNC on analyzer end

PN Mounting Accessories

The AS7 connector cable is

offered in various lengths and is

terminated with choice of BNC or
bare wires.

The Weld-in Socket (see page 18)
is used to mount the Pressurized
Mounting Assembly into tanks or
pipes.

The Pressurized Mounting
Assembly (see page 17) is offered
in four different insertion lengths
and can be used for either the

disposable or rellable Hx348

sensor.

4 RosemountAnalytical.com

December 2014 Steam Sterilizable Solutions

Hx348 Steam Sterilizable and Autoclavable
Combination pH Sensor

Specifications

pH Range: 2 to 12 (0 to 14 for short periods)
Temperature Range: -14 to 275° F (-10 to 135° C)
Maximum Pressure: 58 psig (600 kPa abs, 4 bar)
Wetted materials: Glass, Viton
Process Connections: None
Sensor Lengths: Choice of 120, 150, 200, or 250 mm
Cable Connector: S7 connector plug, single pole
Cable Compatibility: any AS7 connector plug, single pole or

S8 cable
Compatible Mounting Accessory: Pressurized mounting
assembly (see page 17)
Compatible Analyzers: All Rosemount Analytical pH
analyzers/transmitters.

Sample Installation Drawing. Pilot plant fermentor (bioreactor)

using the Hx348 and the Pressurized Mounting assembly in a side

mount installation.

Sensor Dimensional Drawing Model Hx348 Non-refillable
Sensor. The Hx348 Disposable Sensor is recommended for typical

installations requiring low maintenance.

Sensor Dimensional Drawing Model Hx348 Refillable Sensor.

The Hx348 Rellable Sensor is recommended for protein- or sulde-

containing media or for feedstocks requiring pressurized,

continuous owing reference.

RosemountAnalytical.com 5

Steam Sterilizable Solutions December 2014

328A Steam Sterilizable and Autoclavable
Combination pH Sensor

The 328A’s ceramic body and silicone rubber seals provide
excellent chemical resistance to many organic compounds
commonly found in biotechnology, pharmaceutical, and food
& beverage applications. This double junction sensor is offered

with 15 feet of cable and is designed to t into a standard

25 mm mounting assembly.

The 328A’s double junction reference cell resists the effects of
electrode poisoning or fouling. Poisoning or foulling can occur

when ions or substances such as chlorides, suldes, and sugars

react with the Ag/AgCl reference element. The double junc­tion reference further isolates the reference element from the
process to extend the sensor’s life.

328A Sensor and the Standard Mounting Adapter.

Ordering Information

The 328A Steam Sterilizable pH Sensor includes combination pH electrode with 15 ft (4.5 m) of special low noise, high temperature
coaxial cable; double junction reference, gelled reference electrolyte; and ceramic electrode body. Requires standard insertion
mounting hardware for 12mm electrode (PN 22924-00). Integral automatic temperature compensation not available. Compatible
with all Rosemount Analytical pH analyzers/transmitters.

Model

328A

CODE Cable Termination

07 Spade

08 None (bare wires)

328A 08 EXAMPLE

Steam Sterilizable pH Sensor

6 RosemountAnalytical.com

December 2014 Steam Sterilizable Solutions

328A Steam Sterilizable and Autoclavable
Combination pH Sensor

Specifications

Wetted Parts: Ceramic, silicone, and glass
Automatic Temperature Compensation: Temperature

compensation is generally not required since most applications
operate very near pH 7 (isopotential point). When temperature
compensation is required, a separate RTD can be used with
compatible instruments.

Process Connections: 1-1/4 inch NPSL threaded nut
Temperature/Pressure Rating:

50 psig at 266° F (339 kPa abs [3.4 bar] at 130° C)
70 psig at 176° F (475 kPa abs [4.8 bar] at 80° C)

100 psig at 104° F (678 kPa abs [6.8 bar] at 40° C)

Cable: 2-conductor, low-noise coax, 15 ft (4.5 m)
Weight/Shipping Weight: 100 g/180 g (.2 lb/1.0 lb)

Performance: In typical applications, the 328A will perform

continuously for up to 50 steam sterilization cycles

Sensitivity: ±0.02pH
Range: 0-13 pH:

1.67-4.01 pH 96 % linearity

4.01-12.0 pH 99 % linearity

12.0-13.0 pH 97 % linearity

Repeatability: ± 0.05 pH
Recommended Accessories:

PN 22924-00 - 25 mm Insertion Mounting Adapter Kit
PN 23594-00 - Pack of four (4) o-rings (PN 9550154), 2-210 EP

Dimensional Drawing of 328A & Standard Mounting Adapter Hardware Kit (PN 22924-00)

RosemountAnalytical.com 7

Steam Sterilizable Solutions December 2014

ENDURANCE™ 403 Conductivity Sensor

The 403 Sanitary Flange Conductivity Sensors are supplied with

1-1/2 inch or 2 inch stainless steel sanitary process connections.
Models 403-11/12/13 have a maximum temperature rating of
221° F (105° C) and are suitable for sterilization up to
275° F (135° C). Maximum pressure rating for all models is 250

Specifications

Cell Constants: 0.01-cm, 0.1/cm, 1.0/cm
Temperature Range: -10 to 135° C (14 to 275° F)
Maximum Pressure: 250 psig (1695 kPa abs, 17 bar)
Wetted Materials: Titanium, 316 SST, Kel-F (FDA compliant),

EPDM (FDA & Class VI compliant)

Surface Finish: <16Ra
Process Connections: choice of 1-1/2 in. or 2 in. sanitary ange
Sensor Lengths: various
Compatible Analyzers: All Rosemount Analytical conductivity

analyzers/transmitters

Model 403 Sanitary Conductivity Sensors

CODE Cell Constant (required selection)

11 0.01/cm

12 0.1/cm

138A 1.0/cm8 EXAMPLE

CODE Sanitary Fitting (required selection)

20 1-1/2 in. Stainless Steel Sanitary Fitting

21 2 in. Stainless Steel Sanitary Fitting (not available with codes 13 and 14)

psig (1825 kPa). The standard 403 sensor has a Pt 1000 RTD
and a 10 ft (3.1 m) integral cable. An optional 50 ft (15.2 m)
cable is also available. For cable lengths greater than 50 ft (15.2
m), consult the factory.

403 Sensor

CODE Temperature Compensation (optional selection)

- PT1000 (standard) for 1054BLC, 1054BR, 1054BDC, 1055, 54C, 54eC, 81C, 3081C, and 4081C

54 For 1054C, 1054A C, 1054B C, 2081C, and 2054C (Pt 100 RTD)

CODE Additional Options (Optional Selection)

36 Extended insertion length (6.0 in. from inside face of ange to end of sensor) [available with option -11 only]

50 Integral 50 ft cable length

403 13 20 54 36 EXAMPLE

Sensor Dimensional Drawing

8 RosemountAnalytical.com

December 2014 Steam Sterilizable Solutions

Dissolved Oxygen Sensors: Hx438 and Gx448

Emerson’s team sterilizable dissolved oxygen sensors are
designed to exceed industry standards. Other dissolved oxygen
sensors used for biopharmaceutical applications have less
reliable performance and high maintenance requirements,
resulting in high costs and/or short sensor life. The Rosemount
Analytical Hx438 and Gx448 sensors are a result of many years
of experience in sensor manufacturing and have resolved these
problems.

Unique Design: Most dissolved oxygen sensors operate by
reduction of oxygen at the surface of the cathode. Without
protection of the cathode, interferences from other substances
may occur. Our Hx438 and Gx448 sensor cathodes are cov­ered with a gas permeable membrane; therefore, the oxygen
diffusing through the membrane is completely reduced at the
cathode (Clark’s principle). The current between anode and
cathode is proportional to the oxygen content of the sample.

The design of the membrane is the key to achieving the highest
performance. Unlike the conventional thin membrane
design, the Hx438 and Gx448 have a new propriety membrane
material. This thick, steel-mesh-reinforced, double-layer
membrane enables the sensor to withstand high pressure while
maintaining high diffusion rates and short response times.

Fast Response: The extraordinary performance of the new
membrane material leads to short response times, even under
critical conditions.

Longer Life with Less Maintenance: Due to the unique design
of the sensor, maintenance is seldom required. The special
double membrane is less sensitive to contamination from
protein and other fouling agents. The electrode construction
guarantees excellent stability even after numerous steriliza­tions. The graph shown below illustrates the continuous, stable
performance of the Rosemount Analytical dissolved oxygen
sensors for up to 50 steam sterilization cycles without any user
maintenance. Typically, dissolved oxygen sensors from other
manufacturers have to be regenerated or recalibrated after 5 to
10 steam sterilizations.

Minimal Flow Sensitivity: Hx438 and Gx448 membrane
material and overall design ensure that the ow rate has mini­mal effect on the sensor’s measurements.

Short Polarization Time: The polarization time is the time
needed to eliminate all of the oxygen around the cathode
before the sensor provides a stable reading at initial start up.
The polarization time of Model Hx438 and Gx448 sensors is one
third of other conventional steam sterilizable oxygen sensors.

Autoclavable: Small fermentors are normally sterilized in an
autoclave, which is harmful to the electrical 4-pin connections.
With the optional connector cap, autoclaving will not harm the
sensor’s connector.

The Rosemount Analytical dissolved oxygen sensors are low maintenance because the special membrane is designed to repel the
contaminants that are typically known to foul conventional sensor membranes. Also, this membrane is sturdy enough to

maintain a high calibration current, for up to 50 steam sterilization cycles, without any need for cleaning, recalibration, or regen-

eration. Generally, users must perform maintenance on conventional oxygen sensors after only 5 to 10 steam sterilization cycles.

RosemountAnalytical.com 9

Steam Sterilizable Solutions December 2014

Hx438 Rebuildable Steam Sterilizable Dissolved Oxygen
Sensor

The Hx438 sensor provides a drift-free signal and maintains its
calibration value for up to 50 steam sterilization cycles. It can
be used in the biotechnology, pharmaceutical, chemical, and
food processing industries. The Hx438 is offered in four (4)
different lengths for various insertion depths. It uses a 4-pin
connection plug for quick disconnection from the cable. It can

Ordering Information

Model

Hx438

CODE Description

01 120 mm (4.725 in.) shaft length

02 210 mm (8.268 in.) shaft length

03 325 mm (12.796 in.) shaft length

04 425 mm (16.733 in.) shaft length

PN Cable Accessories

9160491 1m (3.3 ft). bare wire on analyzer end

9160492 3 m (9.8 ft), bare wire on analyzer end

9160493 5 m (16.4 ft), bare wire on analyzer end

PN Mounting Accessories

9160478 Insertion 70 mm insertion, use 120 mm sensor

9160477 Retractable 70 mm insertion, use 210 mm sensor

9160484 Service kit for Insertion mounting assembly

9160486 Service kit for Retractable mounting assembly

9160483 15 degree weld-in socket, G 1-1/4 in. thread, 44 mm

SQ 8940 1.5” Triclamp Insertion Assembly

Dissolved Oxygen Sensor (12mm diameter)

be used with the Insertion or Retractable mounting assembly or
similar assemblies typically used with large scale batch pro­cesses that perform SIP cleaning. For smaller batch processes,
it can be threaded directly into the top plate and autoclaved if
necessary.

NOTE: For clean-in-place (CIP) applications, consult factory.

The Hx438 is a 12mm dissolved

oxygen sensor used for a PG

13.5 threaded connection and is

offered in various lengths.

The 4-pin connector cable is

offered in three lengths.

PN Servicing Accessories

9160487 Service kit for sensors, includes 3 membranes modules, o-rings, polishing tool, 20 ml

9160489 50 ml bottle electrolyte

9160490 Connector cap to protect 4-pin connector while autoclaving

9160600 Service Membrane Kit, FDA syle

electrolyte

The Insertion Mounting Assembly (see page 15) can be used

to mount the Hx438-01 into the process tanks or pipes.

The Weld-in Socket (see page 18)
is used to mount the Insertion or
Retractable Mounting Assembly
into tanks or pipes.

The Retractable Mounting Assembly (see page 16)

can be used with the Hx438-02 to achieve inser­tion and removal of the sensor without sutting

down the process.

10 RosemountAnalytical.com

December 2014 Steam Sterilizable Solutions

Hx438 Rebuildable Steam Sterilizable Dissolved
Oxygen Sensor

Specifications

Temperature Range: -10 to 140° C (14 to 284° F)
Maximum Pressure: 59 psig (400 kPa abs, 4 bar)
Wetted Materials: Stainless Steel, EDPM
Process connections: PG 13.5
Sensor Lengths: Choice of 120, 210, 325, or 425 mm
Cable Connector: 4-pin
Cable Compatibility: Standard 4-pin Connector Cable
Compatible Mounting Accessory: Insertion or Retractable

Mounting Assembly (see pages 15 and 16)
Compatible Analyzers: Rosemount Analytical 56, 1056,
5081A, and 1066
Measurement Range: 0 to 20 ppm, 0 to 250 % saturation,
depending on instrument
Temperature Compensation: 22K NTC

Sensor Dimensional Drawing

Sample Installation Drawing. Production Size (500 L to 20,000 L+) Fermentor (or Bioreactor, typically maximum up to

5000 L) with combination of top plate and side mounting using Hx438 and Hx348 in various mounting assemblies.

RosemountAnalytical.com 11

Steam Sterilizable Solutions December 2014

Gx448 Rebuildable Steam Sterilizable Dissolved
Oxygen Sensor

The Gx448 sensor provides a drift-free signal and maintains its
calibration value for up to 50 steam sterilization cycles. It can
be used in the biotechnology, pharmaceutical, chemical, and

food processing elds. The Gx448 is offered in three (3) lengths

for various insertion depths. It uses a 4-pin connection plug
for a quick disconnection from the cable. The cable-to-sensor

connection is water-tight and is protected by the standard cable
protection cap.

It can be mounted directly into the G 1-1/4 inch weld-in socket
using a connector nut.

Ordering Information

Model
Gx448

CODE Description

01 100 mm (3.94 in.)

PN Cable Accessories

9160491 1 m (3.3 ft), bare wire on analyzer end

9160492 3 m (9.8 ft), bare wire on analyzer end

9160493 5 m (16.4 ft), bare wire on analyzer end

PN Mounting Accessories

9160504 15 degree weld-in socket, G 1-1/4 in. thread, 61 mm for -01 and -03 options

9160483 15 degree weld-in socket, G 1-1/4 in. thread, 44 mm for -02 option

Dissolved Oxygen Sensor (25 mm diameter)

PN Servicing Accessories

9160487 Service kit for sensors, includes 3 membranes modules, o-rings, polishing

tool, 20 ml electrolyte

9160489 50 ml bottle electrolyte

9160490 Connector cap to protect 4-pin connector while autoclaving

The Gx448 can be mounted
directly into the G 1-1/4 inch

weld-in socket. The cable
protection cap is a standard
item on this sensor model.

The 4-pin connector cable is

offered in three lengths.

The Weld-in Socket (see page

18) is used to mount the

Gx448 directly into the

process tanks or pipes.

Gx448 shown without the

cable protection cap

12 RosemountAnalytical.com

December 2014 Steam Sterilizable Solutions

Gx448 Rebuildable Steam Sterilizable Dissolved
Oxygen Sensor

Specifications

Temperature Range: -10 to 140° C (14 to 284° F)
Maximum Pressure: 59 psig (400 kPa abs, 4 bar)
Wetted Materials: Stainless Steel, EDPM
Process connections: G 1-1/4 in. thread
Sensor Lengths: 100 mm
Cable Connector: 4-pin
Cable Compatibility: Standard 4-pin Connector Cable
Compatible Mounting Accessory:

G 1-1/4 in weld-in socket, 61 mm, PN 9160504 (see page 18) for -01 and -03 options
G 1-1/4 in weld-in socket, 44 mm, PN 9160483 (see page 18) for -02 option

Compatible Analyzers: Rosemount Analytical 54eA, 1055, 5081A, and Xmt-A
Measurement Range: 0 to 20 ppm, 0 to 250 % saturation, depending on instrument
Temperature Compensation: 22K NTC

Sensor Dimensional Drawing

RosemountAnalytical.com 13

Steam Sterilizable Solutions December 2014

Sensor Mounting Hardware for Hx338 and Hx348 pH
Sensors and Hx438 Dissolved Oxygen Sensor

Rosemount Analytical mounting hardware offers many unique
features and was designed with input from valued customers.
The practical construction of the Insertion, Retractable, and
Pressurized mounting assemblies makes daily use safe and easy.

Cable-to-Sensor Electrical Connection Protected

The integrity of the electrical connection between the sensor
and cable is maintained by the unique cable guard system. This
design is the newest industry standard and allows the user to
remove the sensor and cable easily without threading the cable
through older standard hardware with rubber plugs. When the
cable guard system cap is installed on the mounting hardware,
seals are pressed onto the cable and held secure, protecting
the electrical connection from dirt and moisture. The unique
design of the cable guard system is a standard feature on the
Insertion, Retractable, and Pressurized mounting assemblies.

Constructed for Safe Use:

The Retractable and Pressurized mounting assemblies have
unique safety features to accommodate many biopharmaceuti­cal and industrial applications.

Retractable Mounting Assembly:

The retractable assembly allows the sensor to be inserted or
removed by pressing a single button. This special construction
prevents the user from inserting the hardware without the
sensor. This feature protects the process media from acciden­tally being contaminated by the surrounding conditions and
prevents the process from escaping from the tank or pipe.

protective cage, both of which allow turbulent ow around

the electrode and therefore minimize the risk of clogging.

Withstands Harsh Environments:

The materials of construction were selected with respect
to rugged industrial environments. All wetted parts are
made of stainless steel (type: 1.4571; AISI/SAE 316 TI; B.S.
320 S17), o-rings are Viton, and the cable guard system is

ber-reinforced Polycarbonate.

Pressurized Mounting Assembly:

The pressurized assembly uses a slow pressure release system.
When the assembly’s lever is turned, the pressure is slowly
released. This lever can be turned 90 degrees for easy sensor
access. The rounded seals guarantee that the hardware is
completely pressure tight and the integrated manometer helps
control the pressure, thus avoiding the risk of overpressurizing
and damaging the sensor. The glass cylinder is polymer coated,
making it shatter-proof.

The glass was forced to break

at 150 bar (far above any

needed pressures) and the
glass still remains intact.

Sensor Protection from Process Solids:

All new Rosemount Analytical mounting assemblies have a
sensor protection system. This design protects the elec­trode-measuring tip from possible damage from solid
components of the sample, e.g. undissolved reagents of ice.
The Insertion or Pressurized assemblies use three rugged pins
for sensor protection, and the Retractable assembly uses a

14 RosemountAnalytical.com

December 2014 Steam Sterilizable Solutions

Insertion Mounting Assembly

The Rosemount Analytical Insertion Mounting Assembly (PN

9160478) is the best selection for all biopharmaceutical and
standard industrial applications. It is designed for the instal­lation of 120-mm sensors with PG 13.5 threads, for either pH
or dissolved oxygen measurement. It is easily mounted into

Specifications

Mechanical Connection: G-1-1/4 in.
Total Length: 215 mm
Maximum Diameter: 57 mm
Materials of Construction: 316L SS/DIN 1.4435, EPDM
Surface Finish: < 16 micro inch Ra
Temperature Range: -10 to 140 ° C (14 to 284° F)
Maximum Pressure: 6 bar (87 psi)
Insertion Length: 70 mm
Compatible Sensors:

Hx338-01 pH (see page 2)
Hx438-01 Dissolved Oxygen (see page 10)
All electrodes with PG 13.5 threads and 120 mm length

Mounting accessory needed for installation:

PN 9160483 weld-in socket or other G 1-1/4 in. threaded socket

G 1-1/4 inch sockets and the Viton o-rings can be changed
without special tool. The practical cable guard system protects
the electrical connection from dirt and moisture.

The Insertion Mounting Assembly (PN

9160478) can be used with the Hx338-01
pH sensor or the Hx438-01 dissolved oxygen

sensor.

A pH sensor shown in the tip of the Insertion
Mounting Assembly. The three pins protect
the glass bulb.

Parts Locator for the Insertion Mounting Assembly

Technical Data / Technische Daten P/N 237331-OP

 Material / Material: SS 316L / DIN 1.4435
 Temperature Range: 0 – 135° C
 Max. pressure: 6 bar
 H = O-Ring Position: 22 mm
 O-Ring Material: FDA-EPDM

RosemountAnalytical.com 15

Steam Sterilizable Solutions December 2014

Retractable Mounting Assembly

The Rosemount Analytical Retractable Mounting Assembly (PN

9160477) is the ideal sensor accessory for large scale biopharm
and industrial applications. The holder enables the user to
install 225 mm length pH or 210 mm length dissolved oxygen
electrodes into critical processes. The sensor can be retracted
from the process for cleaning, calibrating, or exchanging the
electrode without stopping or interrupting the process. It is
designed for use with 210 to 225 mm length PG 13.5 threaded
sensors (for use with Hx338 and Hx438 sensors).

The Retractable Mounting Assembly is very easy to use and
maintain. One push button allows insertion and removal of the

Specifications

Mechanical Connection: G-1-1/4 in.
Total Length: 316 mm (measuring position); 400 mm

(retracted position)

Maximum Diameter: 57 mm
Materials of Construction: Stainless Steel 1.4571; AISI 316 Ti,

EDPM

Surface Finish: < 16 micro inch Ra
Temperature Range: -10 to 140 ° C (14 to 284° F)
Maximum Pressure: 4 bar (59 psi)
Insertion Length: 70 mm

Compatible Sensors:

Hx338-02 pH (see page 2)
Hx438-02 Dissolved Oxygen (see page 10)
All 12 mm electrodes with PG 13.5 threads and 210 to 225 mm
length
Mounting accessory needed for installation: PN 9160483
44 mm weld-in socket or other G 1-1/4 in. threaded socket

sensor. All O-rings can be changed easily and without special
tools. A special safety lock prevents the user from moving
the hardware into the process without an electrode installed,
which in turn prevents exposure of the process tank to the outer
atmosphere.

When the sensor is retracted, it is placed into the electrode
chamber. In this retracted position, the sensor can be cleaned,
calibrated, or stored wet without dismounting from the holder.
The tube connectors allow easy tube access to the electrode
chamber.

The Retractable Mounting Assembly (PN 9160477)

can be used with the Hx338-02 pH sensor or the

Hx438-02 dissolved oxygen sensor.

16 RosemountAnalytical.com

December 2014 Steam Sterilizable Solutions

Pressurized Mounting Assembly

The Rosemount Analytical Pressurized Mounting Assembly is
especially designed for use in every critical processes or appli­cations where high accuracy or long-term stability is required

and a owing reference junction is needed. Such sensors need

to be pressurized over process pressure to enable the reference

electrolyte to slowly ow out of the sensor.

The Pressurized Mounting Assembly enables installation of
these sensors into a process tank or pipe. The hardware uses

rounded seals, ensuring that the sensor ts tightly into the

hardware. Large windows permit viewing of the electrolyte

PN DESCRIPTION

9160479 Pressurized mounting assembly for 70 mm

insertion (uses 120 mm sensor)

9160480 Pressurized mounting assembly for 100 mm

insertion (uses 150 mm sensor)

9160481 Pressurized mounting assembly for 150 mm

insertion (uses 200 mm sensor)

9160482 Pressurized mounting assembly for 200 mm

insertion (uses 250 mm sensor)

Specifications

Mechanical Connection: G-1-1/4 in.
Total Length: 395 mm (of installed holder)
Maximum Diameter: 60 mm
Materials of Construction: Stainless Steel 1.4571; AISI 316 Ti,

Viton

Temperature Range: -10 to 130 ° C (12 to 266° F)
Maximum Pressure: 6 bar (87 psi)

Standard Immersion Length: 70, 100, 150, and 200 mm
Compatible Sensors: Hx348 pH (see page 4)
Mounting accessory needed for installation: PN 9160483

44 mm weld-in socket or other G 1-1/4 in. threaded socket

level in the sensor. The integrated manometer indicates the
pressure applied to the sensor’s electrolyte. The hardware
is equipped with a lever to slowly depressurize, making
removal of the sensor simple while avoiding opening of the
holder under pressure. Three stainless steel pins protect the
sensor against breakage from solids found in the process.

The Pressurized Mounting Assembly is available in various
lengths for installation into tanks or fermentors with differ­ent wall thickness (e.g. isolated or double walled types).

Removing the pressure from
the assembly is simple:

Step 1: Pressurized Mounting Assembly shown

without cable protection cap. Notice the lever

is in pressurized position.

Step 2: Pressurized Mounting Assembly shown

with lever in pressure release position.

Step 3: Once pressure is released, the sensor

can be removed from the Pressurized Mounting

Assembly.

A pH sensor shown in the tip
of the Pressurized Mounting
Assembly. The three pins
protect the glass bulb.

RosemountAnalytical.com 17

Steam Sterilizable Solutions December 2014

Installation Accessories

The Tri-Clamp adapter makes sensor mounting easy. These

316 stainless steel Tri-Clamp ttings are ideal for any sanitary

mounting application used in the Biopharm and food & bev­erage industries. Simply insert the sensor into the Tri-Clamp
adapter and tighten down locking nut over the G 1-1/4 inch
threads. The Tri-Clamp is available in 1 - 1/2 inch and 2.0 inch

ange sizes to meet any mounting conguration.

The weld-in socket is the base for the instal­lation of Rosemount Analytical’s mounting
hardware. Made of stainless steel, it is easily
welded into a tank, fermentor, or pipe. Due to
the special design, it maintains its exact inner
diameter after welding, which is important with
respect to the correct tightening of the holder’s o-rings. The
socket has an installation angle of 15° that enables an optimal

and exible installation. The weld-in socket can also be used to

mount the Gx448 directly to the process.

PART # DESCRIPTION

9160483

9160504

Weld-in threaded socket, G 1-1/4 in., 44 mm

Weld-in threaded socket, G 1-1/4 in., 61 mm

18 RosemountAnalytical.com

December 2014 Steam Sterilizable Solutions

Analyzers and Transmitters For Use
with Steam Sterilizable Sensors

Rosemount Analytical is proud to offer a full line of analyzers

and transmitters to t each individual process need. Below, you
will nd the key features and benets. If you need more infor-

mation about a particular analyzer/transmitter, please consult
Rosemount Analytical, Liquid Division, at the number listed on
the back page of this data sheet.

Model 56 1056 5081 1066

2-Wire or 4-Wire 4 4 2 2

Power 115/230V AC 24V DC115/230V AC 24V

DC

Mounting Options Panel, Pipe, Wall Panel, Pipe, Wall Pipe Panel, Pipe, Wall

HART Communications pH, ORP, Cond, DO pH, ORP, Cond, DO pH, ORP, Cond, DO pH, ORP, Cond, DO

Handheld Remote

AMS Compatible pH, ORP, Cond, DO pH, ORP, Cond, DO pH, ORP, Cond, DO pH, ORP, Cond, DO

FOUNDATION Fieldbus – – pH, ORP, Cond, DO pH, ORP, Cond, DO

Enclosure Features NEMA 4X, IP65 NEMA 4X, IP65 NEMA 4X NEMA 4X, IP65

Current Outputs 4 2 1 1

Alarms 3+ fault 3 0 0

Relay Contacts 4 3 0 0

Compatible Sensors Hx338

pH

Conductivity

Dissolved Oxygen

– –

Hx338
Hx348
Hx438
Gx448

403

Hx348

Hx438

Gx448

403

   
   
   

24V DC 24V DC



Hx338
Hx348
Hx438
Gx448

403

–

Hx338
Hx348
Hx438
Gx448

403

RosemountAnalytical.com 19

Steam Sterilizable Solutions Product Data Sheet

LIQ_PDS_Steam_Sterilizable/Rev.I December 2014

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