Rosemount Analytical Hx438 Specifications

Product Data Sheet

June 2017

LIQ-PDS-Hx438

Rosemount™ Hx438

Amperometric Steam Sterilizable Dissolved Oxygen Sensors

Amperometric Steam Sterilizable Dissolved Oxygen Sensors

The Rosemount Hx438 dissolved oxygen sensor is used in a variety of industries and applications and is designed to meet strict steam
sterilization requirements required by top tier life sciences and food and beverage customers.

Rosemount Hx438 Dissolved Oxygen Sensors

Overview

June 2017

Steam Sterilizable and Autoclavable Design

 Allows for fixed or retractable mounting configurations.

 Measures after many Steam-in-Place (SIP) applications.

 Provides fast and stable readings.

 Short polarization time.

Versatile Installation Options

 The sensor features a PG 13.5 process connection and is

compatible with insertion mounting assemblies (sold
separately).

 Installs easily with quick cable-to-sensor connections.

 Easily installs into insertion mounting assembly for mounting

into G 1–¼ in. sockets.

Contents

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Dimensional Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2

Sensor Mounting Hardware . . . . . . . . . . . . . . . . . . . . . . . .7

Insertion Mounting Assembly . . . . . . . . . . . . . . . . . . . . . . 8

Installation Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

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June 2017

Rosemount Hx438 Dissolved Oxygen Sensors

Ordering Information

Rosemount Hx438 dissolved oxygen 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. Rosemount
Hx438 dissolved oxygen sensor uses a 4-pin connection plug for quick disconnection
from the cable (sold separately).

The sensor can be used with the Insertion 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.

Table 1. Rosemount Hx438 dissolved oxygen sensors ordering information

Model Sensor Type

Hx438 Amperometric Steam Sterilizable Dissolved Oxygen Sensors

Sensor Length

01 120 mm

Typical Model Number: Hx438-01

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Rosemount Hx438 Dissolved Oxygen Sensors

Specifications

Table 2. Rosemount Hx438 dissolved oxygen sensors specifications

Operating Temperature Range 32 to 266 °F (0 to 130 °C)

Maximum Pressure 43 psig (400 kPa abs, 4 bar)

Measurement Range 0 to 20 ppm, 0 to 250% saturation, depending on instrument

Wetted Materials Stainless steel and EPDM

Process Connections PG 13.5 thread

Cable Connector Standard 4-pin connector

Cable Compatibility Standard 4-pin connector cable

Compatible Mounting Accessory Insertion mounting assembly. See

Compatible Transmitters Rosemount transmitter models 56, 1056, 5081, and 1066

Temperature Compensation 22K NTC

Table 3. Insertion mounting assembly specifications (P/N 9160478)

page 8.

June 2017

Mechanical Connection G-1–¼ in.

Total Length 215 mm

Maximum Diameter 57 mm

Material of Construction 316L SS/DIN 1.4435, EPDM

Surface Finish < 16 micro inch Ra

Temperature Range 14 to 284 °F (-10 to 140 °C)

Maximum Pressure 6 bar (87 psi)

Insertion Length 70 mm

Compatible Sensors

Mounting accessory needed for installation PN 9160483 weld-in socket or other G 1–¼ in. threaded socket

Rosemount Hx438 dissolved oxygen sensors
All electrodes with PG 13.5 threads and 120 mm length.

4

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June 2017

Dimensional Drawings

Figure 1. Rosemount Hx438-01 dimensional drawing

Rosemount Hx438 Dissolved Oxygen Sensors

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Rosemount Hx438 Dissolved Oxygen Sensors

Figure 2. Rosemount Hx438 dissolved oxygen sensor sample installation drawing

June 2017

6

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June 2017

Rosemount Hx438 Dissolved Oxygen Sensors

Sensor Mounting Hardware

Rosemount mounting hardware offers many unique features and was designed with input from valued customers. The practical
construction of the insertion mounting assembly 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.

Sensor Protection from Process Solids

All new Rosemount 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 assembly uses three rugged
pins for sensor protection.

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Rosemount Hx438 Dissolved Oxygen Sensors

June 2017

Insertion Mounting Assembly

The Rosemount Insertion Mounting Assembly (PN 9160478) is the best selection for all bio-pharmaceutical 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 G 1–¼ in. 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.

Figure 3. Insertion mounting assembly

8

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June 2017

Rosemount Hx438 Dissolved Oxygen Sensors

Installation Accessories

Weld-in Socket

The weld-in socket is the base for the installation of Rosemount’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
flexible installation.

Figure 4. Weld-in Socket

Part Number Descripon Dimension
9160483 Weld-in threaded socket,

-

¼ in., 44 mm

G1

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A B
44 1.74 55 2.17

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Rosemount Hx438 Dissolved Oxygen Sensors

Accessories

Table 4. Rosemount Hx438 dissolved oxygen sensors accessories information

Part number Description

Cable Accessories

9160493 5m (16.4 ft), 4-pin connector, bare wire on transmitter end

Mounting Accessories

9160478 Insertion 70mm insertion, use 120 mm sensor

9160484 Service kit for insertion mounting assembly

9160483 15° weld-in socket, G1–¼ in. thread, 44 mm

Servicing Accessories

June 2017

9160487

9160489 30 ml bottle electrolyte

242000 Third party labeled connector cap for 4-pin connector for autoclaving (compatible with Hx438-01)

24262-00 Third party labeled replacement anode/cathode cartridge.

Service kit for sensors, includes three FDA approved membranes modules, O-rings, polishing tool,
20 ml electrolyte

10

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June 2017

Notes:

Rosemount Hx438 Dissolved Oxygen Sensors

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Rosemount Hx438 Dissolved Oxygen Sensors

LIQ-PDS-Hx438

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