Rosemount Analytical Oxymitter 4000 Specifications

Xi Advanced Electronics

Offered With

Now

Oxymitter

TM

CMB-PDS-340-B01

Oxymitter 4000

In Situ Oxygen Transmitter

▀ Outstanding accuracy

▀ Electronics mounted to probe

or separate

▀ Optional Xi advanced electronics

– large backlit LCD display
– advanced software features
– Wireless - via THUM Adaptor

▀ Adaptable to any existing O2 probe

installation

▀ Advanced sensor diagnostics

– alarm indicates when calibration
is recommended

▀ Optional explosion-proof ratings

▀ Digital HART

®

or FOUNDATION™
eldbus communications
– AMS/PlantWeb® compatible

▀ Fully eld-repairable

▀ Variable probe insertion option

THE LATEST BREAKTHROUGH FOR
COMBUSTION FLUE GAS ANALYSIS

The Oxymitter In Situ Oxygen Transmitter was the world’s

rst in situ, zirconium oxide-based oxygen transmitter for
ue gas measurement. These oxygen measurements can
be used in a control system or by a boiler operator to ne
tune burner fuel/air ratios for maximum efciency. Ideal for:

•

• process heaters • reheat furnaces
Emerson is the leader in oxygen ue gas analyzer technol-

ogy. Our in situ, zirconium oxide oxygen analyzers have
long been established as industry standards. We’ve com­bined our expertise with the latest Rosemount transmitter
technology to create a truly
revolutionary package – the Oxymitter.

The Oxymitter integrates an oxygen probe and eld
electronics into a single, compact package. The probe
inserts directly into a ue gas duct to measure oxygen in
combustion processes. No sampling system is required.

A NEMA 4X, IP 66 Rosemount transmitter housing mounts
directly to the probe and contains the transmitter’s
electronics, replacing common stand-alone eld
electronics. This integrated design minimizes the costs of
installing separate probe cable, conduit and electronics.

boilers • kilns

Wireless THUM

mounts to either electronics

Product Data Sheet

August 2017

Integral or Remote

electronics

TM

Adaptor

Optional Xi

enhanced interface

The Oxymitter electronics also require 95% less power
to operate. So, its components last longer. Traditional
architecture with remote-mounted electronics is also
offered.

The HART
Web
Instrument technicians can interface with the Oxymitter
from the control room or any location where the trans­mitter’s signal wires terminate. Service diagnostics and
calibrations can be performed remotely with a HART
hand-held communicator or a personal computer equipped
with AMS.

The Oxymitter is fully eld-repairable. The probe’s design
provides convenient access to internal probe components
so technicians can service the unit in house. The cell and
heater/thermocouple are fully eld-replaceable. The
Oxymitter contains no potentiometer adjustments or
jumpers.

The Oxymitter In Situ Oxygen Transmitter operates at
process temperatures up to 1300°F (700°C), providing a
fast response with high accuracy and reliability. Available
lengths from 18 inches to 18 feet.

Optional accessories for the Oxymitter include:
– auto calibration gas sequencer
– remote, loop-powered Vacuum Fluorescent display

of oxygen reading
– high temperature accessories for temperatures

up to 1832°F (1000°C)
– ame arrestor
– abrasive shield

®

protocol provides a link into Emerson’s Plant-

®

eld-based architecture.

Oxymitter

TM

August 2017

VARIABLE INSERTION OPTION

The new varible insertion option permits ideal
placement of the probe into the ue gas duct.
Probe can be adjusted at any time on-line to
characterize stratication across large ducts.

THE OXYMITTER OXYGEN TRANSMITTER IS COMPLETELY FIELD-REPAIRABLE

Diffusion Filter and Sensor Cell Assembly

•

Outstanding accuracy– + or - .75% of reading or .05% O

• Special cells for tough service in SO2 and HCL

• Rugged steel cell holder – cells will not crack

General Purpose – OXT4A

• Lengths from 18” (.9m) to 18’ (5.5m)

• ANSI, DIN and special anges (1.8m) (5.5m)

• Flat-faced (snubber), Hastelloy and Ceramic Diffusers

• -40°F to 185°F(-40°C to 70°C) ambient temperature limit

• HART or FOUNDATION™ Fieldbus communications

• “Calibration Recommended” diagnostic

Integral to Probe

or Remote Mounted

2

Heater/Thermocouple Assembly

Electronics

Xi Enhanced Interface

Easy-to-read backlit display

• Lowest cost of installation

• Bright gas uorescent local operator interface (LOI)

• Thru-glass infrared pushbuttons are suitable for hazardous areas

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•

• Easy-to-use keypad

• IP66 (NEMA 4X) enclosure

• Advanced software features

• Loss of ame relay option turns heater off upon ame loss

August 2017

Advanced Features

Automatic Calibration - available with Oxymitter
or Xi electronics

Plant personnel often ask how frequently an oxygen
analyzer requires calibration. The answer is very
application-dependent based upon the fuels being burned,
normal levels of oxygen and the sulfur content in the ue
gases. The X-STREAM Xi addresses this concern by
providing an on-line diagnostic that determines when
a calibration should be conducted, eliminating many
unneeded calibrations and the technician and gas
resources they consume. The X-STREAM electronics has
an on-line impedance measurement for the sensing cell.

Oxymitter or Xi Enhanced
Interface and Advanced
Feature Electronics

Oxymitter

This feature can trigger a fully automatic calibration by
sequencing solenoids to introduce calibration gases to the
sensing cell. The Single Probe Sequencer (SPS) switches
CAL gases to a single probe, while a Multi-Probe
Sequencer (IMPS) can handle 1 to 4 probes. Many
needless calibrations based on “time in service” are
eliminated. A contact closure noties the control room
when a calibration is taking place. The oxygen output
signal can be held at its last value, or released during
calibration. The X-STREAM can also initiate calibrations
by traditional methods:

• Contact closure from the user’s control room

• Time since last calibration feature – established by
the autocalibration system

• Xi enhanced interface

• HART/AMS

TM

Single Probe Sequencer (SPS)

Optional Wireless THUM Adaptor

Transmit the O

2

Model 375/475
Handheld Communicator

signal, along with all HART information.

Oxymitter

TM

Advanced Software features (available only with the Xi electronics)
Extended Process Temperature Range to
800°C (1562°F)

The X-STREAM oxygen analyzer employs a heater and
thermocouple to maintain a temperature setpoint at 736°C
(1357°F). Temperature control is maintained within ±1°C
to process temperatures of about 705°C (1300°F). This is
satisfactory for most applications, but excursions to higher
temperatures can occur in many processes. In these
instances, the heater is turned off and the process
temperature is utilized to heat the sensing cell.

The oxygen reading is adjusted immediately to
compensate for the varying process temperatures. It
should be noted that cell life will be reduced by
continuous operation at temperatures above 705°C
(1300°F). If process temperatures are expected to
continuously be above 705°C, we recommend the use of
a bypass or probe mounting jacket accessory (see page

10).

Stoichiometer

Process upsets can sometimes cause a combustion
process to go into substoichiometric or reducing condi­tions. The oxygen readings from one or more probes may
decline all the way to zero. The stoichiometer cell will
measure the amount of oxygen deciency during these
reducing conditions. The trends in your DCS can be set
up for a lower range limit of -1 or -2% oxygen to depict the
level of oxygen deciency.

The operator can see if his control actions to recover are
having the desired effect. These types of events do not
occur frequently, but knowing the parameters of the
situation prevents overcorrecting while coming out of the
reducing condition.

Acid-Resistant Stoichiometer Cell

August 2017

Typical DCS Trend During a Reducing Process
Event

Programmable Reference

The zirconium oxide sensing technology has historically
measured process oxygen by using ambient or instrument
air as a reference (20.95% oxygen). The sensor develops
most of its signal at the low oxygen levels typically found
in combustion ue gases (2-4% oxygen) and is most
accurate at these levels. When measuring at levels
near ambient, however, the sensor develops only a few
millivolts of signal and accuracy degrades.

The programmable reference feature permits the user
to use a bottled reference gas of low oxygen value (.4%
oxygen recommended). When measuring at or near 21%
oxygen, a strong negative oxygen signal results with much
improved accuracy. A bottle of reference gas typically lasts
about a month at the low ows required.

DCS Trend With X-STREAM Stoichiometer Feature

Typical applications include:
Flue Gas Recirculation – controlling the mixing of ue

gases into the burner windbox prior to the burner to reduce
NOx emissions.

Moisture Monitoring – measuring the amount of moisture
coming off of industrial dryers by noting the dilution effect
water vapor has on the normal 20.95% ambient drying air.

Enriched Oxygen Combustion – Pure oxygen is
sometimes mixed in with the combustion air to increase
heat at the ame. This is used in steel and other
metals reduction processes and also in some catalyst
regenerators.

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August 2017

SPECIFICATIONS

MeasurementSpecications

Net O2 Range: variable 0-10% to 0-40%
(Xi electronics offer 0-50% O2 range)

Accuracy in
Oxidizing conditions:

O2, whichever is greater

Lowest
detectable limit— .02% O

Process
Temperature Effect— less than .05% O2 from 100-700°C

System Speed of
Response to
Calibration Gas:

T90 in less than 8 seconds. Response to
process gas changes will vary, depending
on process gas velocity and particulate
loading of the diffuser

Calibration Validity: Presentation of calibration gases matches
the normal process to within ±.02% O

Accuracy in
reducing conditions: ±.10% of reading, or .1% O2, whichever

is greater

System Response in
Reducing Conditions: going from oxidizing to reducing

-T90 in 120 sec.
going from reducing to oxidizing

-T90 in 30 sec.

EnvironmentalSpecications

Transmitter Probe: Process-wetted materials are 316L or 304
stainless steel

Process
Temperature Limits: 0 to 705°C (32-1300°F) with

Oxymitter electronics
0 to 800°C (32-1472°F) with
Xi electronics
*reduced cell life can be expected if
operated continuously at temperatures
above 705°C (1300°F) optional bypass
and jacket accessories permit operation
to 1050°C (1922°F)

Oxymitter Transmitter
Electronics Housing
(integral to probe, or
remote mounted): Low copper aluminum IP 66 (NEMA 4X),

with reference air exhuast port piped to
clean area

General Purpose

Certications:

Oxymitter
electronics
ambient temp.
Limits: -40° to 80°C (-40° to 176°F)

Temperature limit
as measured inside
Oxymitter electronics: -40° to 85°C (-40° to 185°F)

Temperature limit of
see-thru
IR pushbuttons: -40° to 70°C (-40° to 158°F)

Optional
Xi Electronics: NEMA 4X, Polycarbonite Material

1

±0.75% of reading or 0.05%

2

Initial response in less than 3 seconds,

2

Oxymitter

TM

General Purpose

Certications:

Xi Ambient Temp.
Limits: -20° to 55°C (-4° to 131°F)

Xi Temp. Limits as
measured inside
the housing: -20° to 55°C (-4° to 113°F)

Xi LCD display
Temp. Limits:

-20° to 55°C (-4° to 131°F)

InstallationSpecications

Probe Mounting
Flange: vertical or horizontal — 2” 150# (4.75”

(121mm) bolt circle)
DIN (145mm (5.71”) bolt circle)

Note: anges are at-faced, and for
mounting only. Flanges are not
pressure-rated.

Spool piece P/N 3D39761G02 is available,
to offset electronics housing from hot
ductwork.

Many adaptor anges are available to
mate to existing anges.

Probe Lengths and Approximate Shipping weights:

18 in. (457 mm) package: 16 pounds (7.3 kg)
3 foot (0.91 m) package: 21 pounds (9.5 kg)
6 foot (1.83 m) package: 27 pounds (12.2 kg)
9 foot (2.74 m) package: 33 pounds (15.0 kg)
12 foot (3.66 m) package: 39 pounds (17.7 kg)
15 foot (4.6 m) package: 45 pounds (20.5 kg)
18 foot (5.5 m) package: 51 pounds (23 kg)

Reference Air
(optional): 2 scfh (1l/m), clean, dry, instrument

quality air (20.95% O2), regulated to

2.5 psi (34kPa)

Calibration: Semi-automatic or automatic
Cal Gases: .4% O2 and 8%, balance N2

recommended

Cal Gas Flow: 5 scfh (2.5 l/m)
Heater Electrical

Power: 100 - 240V, ±10% 50/60 Hz 1/2”— 14”

NPT conduit ports

Traditional
Architecture Cable: 200 foot (61m) maximum length

Power Consumption
of Probe Heater: 776VA maximum during warm-up

Electrical Power of
Oxymitter or optional
Xi electronics: 120 to 240V, ±10% 50/60 Hz

Power Consumption
of Xi: 10 watts maximum

Xi Alarms Relays: 2 provided - 2 amps, 30 VDC
Xi Optional Loss of

Flame Contact: Removes heater power

Oxymitter

Electrical Noise:

Meets EN 61326, Class A

Traditional Architecture
Cable: 200ft (61m) maximum length

Power Consumption of
Probe Heater: 776VA maximum during warm-up

Transmitter Electrical
Power: 12 – 42VDC, (loop-powered from the

control room or from the Xi box)

TM

August 2017

General Purpose

HART communications - OXT4A pg. 11
FOUNDATION

Fieldbus Communications - OXT5A pg. 13
Direct Replacement Probe

(for use with existing electronics) - OXT4ADR pg. 15

Automatic calibration systems - XSO2Cal pg. 16

Optional Xi advanced electronics - Xi pg. 17

Power Supply and Load Requirements

Electrictical Power
for Xi: 100-240V ±10%, 50-60Hz

Power Consumption
of Xi: 12VA maximum or

776VA maximum with Traditional
Architecture, 120V, Probes.
450VA maximum with Traditional
Architecture, 44V Probes

Alarm Relay Outputs: Two provided - 2 Amperes, 30 VDO,
Form-C

Optional Loss of
Flame Input: internally powered input to remove

heater power, actuated via dry
contact output from prove of ame
device.

Emerson has satised all
obligations coming from the European legislation
to harmonize the product requirements in Europe.

operating variables constant. Specications subject
to change without notice.

1

All static performance characteristics are with

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