iO2
GAS SENSOR

002708Issue 3Oxygen (02) Intelligent Series Gas Sensor (iseries)

DOCUMENT PURPOSE
The purpose of this document is to present
the performance specification of theintelligent iO2 oxygen gas sensor.
This document should be used inconjunction with the Product Safety
Datasheet (PSDS 5). For guidance on thesafe use of the sensor, please refer to theCommunication Protocol (SDCS) andSensor Mounting Application Note.

PORTFOLIO

Compact, digital andintelligent gas sensors, iseries
sensors are precalibrated,interchangeable and feature digital
traceability. These sensors are rated
for longer life and are designed tooperate in extreme environmental
conditions.

2 YEAR WARRANTY(24 months from date of despatch)

LEA D F REE

Oxygen (O2) Sensor: iO2
Part Number: AAW85-07WD-CIT

FEATURES AND BENEFITSUARTDigital interface –The sensor has a
UART protocol tocommunicate with
the instrument withchip select option
as described in theCommunication
Protocol (SDCS)

Interchangeable –All intelligent
sensors have thesame dimensions
and communication
protocol. All sensors
in the range will workwith a supply voltage
from 3.1 V to 3.3 V

Digital traceability –Sensors containthe following data:
serial number,manufacturingdate, and gas typefor quick and easy
identification of thesensor.

Pre-calibrated –Sensors will becalibrated during
manufacturing andcalibration data is
written in the sensor.
Sensor will output
gas concentration
when interrogated byinstrument

OEM lock – Sensors have two levelsof lock codes. The first one is an OEM
specific code programmed in during
manufacture and cannot be modified.
This lock code is provided by the OEM.
Instrument can check if the sensor has theunique code – if not the instrument canrefuse the sensor. The second level of lockcode is left blank and can be updated by
OEM/Partners during sensor integration
into the instrument as needed

Predictive
calibration – The
recalibration alarm
will be triggered when
the countdown timer
is reachedEnd-of-life
indication – The
alarm will be flagged
when the sensor
has taken/lost a
considerable amountof water (electrolyte
concentration isabove or below limits)

Fault indication –Intelligent sensors
can detect
several internalfaults like drift/fault in referenceelectrode, electrolyte
concentration outof range, counterelectrode fault;
therefore notifying
the user to takecorrective actions

Compact form
factorDesigned to meet global performancestandards

Five-year life

ATEX and IEC Ex Certified perEN IEC 60079-0 and EN IEC 60079-11

RoHS compliant

Designed to meet performancestandards: BS EN 50104,
ANSI/ISA 92.04.01 and
AS/NZS 4641-2007

INTELLIGENT SERIES GAS SENSORS (iSERIES)iO2 SERIES
Product Dimensions
20,0 (includes label)±3% vol. O2T90* Response Time
<15 seconds, typ.
(from air to N2 20.9%V/V)
T50* Response Time
<10 seconds at 20°C
(from air to N2 20.9%V/V)
Output% O2 (compensated for temperature)

R90 Recovery Time<45 seconds (for -20°C to 60°C)

R95 Recovery Time

<60 seconds at 20°C

Measurement Interval

1 sample per second (1 Hz)

Resolution

0.1% O2

Zero Current (Offset)

After 3 minutes N2,<0.6% vol. O2 equivalent
Typically, <0.3% vol. O2 equivalent

Repeatability*±5% of measured value

Orientation Sensitivity<0.2% vol. O2 equivalentWarm-up Time

Up to 60 minutes for accurate
measurements (see iO2 characterisationnote for details)

Serial Communication

UART with Chip Select45°‡‡ (O-ring)

2,0 typ.

5,4+V-VeØ 2,00
Shorting pads
3 posn.

Recommended Storage
Temperature

0°C to 20°C

Operating Pressure
Range

600 mbar to 1200 mbar

Pressure Coefficient<0.02% signal/mbar

Thermal Transient

Temp plunge 22°C to -20°C | -20°C to 22°C
(No alarm is triggered)<19.5% vol. O2, >23.5 % vol. O2

Pressure Transient

60 cm H2O step change<150% signal change

Flow Rate

Typical: 200 ml/min when using
recommended gassing hood.
(Consult iseries Sensor Mounting Application
Note.)

LIFETIME
Long-Term Output Drift*<5% signal life over operating life

Expected Operating Life

5 years in air

PHYSICAL CHARACTERISTICS

CSRx

3,5 3,55% RH to 95% RH (non-condensing)

7,75

Operating Humidity
Range

14,2

-40°C to 60°C

For mounting and sealingaround sensor, refer to iseries
Sensor Mounting Application
Note.

7,00 ±0,10

10,8ENVIRONMENTAL
Operating Temperature
Range(19,76)

Accuracy† (overconcentration range)

Ø17,000% to 25% vol. O2- The sensor can read up to 30% O2(10,3)(incl. top cover)

Range

2O2

10,0 ±0,2

Target Gas

Do notobscure

10,0 ±0,23,00 +0,10/-0,15

Lead-free electrochemical

1,0 typ.

Operating Principle

20,0 (includes label)

MEASUREMENT

Tx

3,6 3,67,00

TABLE 1. TECHNICAL SPECIFICATIONSAll dimensions in mm
Do not connect tounlabeled pins.

1,86,75

TABLE 2. ELECTRICAL SPECIFICATIONS
Min.

Max.

Typ.

Unit

Supply Voltage (Vdd)

33.6

3.3

Vdc

Voltage of any pin relative toground

03.6–Vdc

Peak supply current (typ. volt)
Current: at stand-by mode

25–mA–

140.08Current: at active mode––

146.79mA

Average power consumption

0.42900.48mWFor compatibility with the whole iseries range, the supply voltage should bebetween 3.1 V and 3.3 V.

TABLE 3. PINOUT

Weight<6 gPinDescription

Contact Material

Gold plated+V

Positive power supply

O-Ring Material

FKM60 ±5 shore A

Outer Plastic Body
Material

Modified PPO-VRx

GroundData transmitted from instrument to sensor* Specifications are valid at 20°C, 50% RH, and 1013 mbar using Honeywellrecommended circuitry. Performance characteristics outline the performance ofsensors supplied within the first three months. Output signal can drift below thelower limit over time.

Tx

Data transmitted from sensor to instrument

CS
Other Pads

Chip SelectDo not connect, shorting link contacts only

† For best accuracy, it is recommended that a ‘baseline’ calibration is performedin clean ambient air when a new sensor has been installed into the instrument.

mANOTE: Oxygen cells are shipped with a shorting clip which must be removedprior to installation.

iO2 Series Gas Sensor Datasheet | sps.honeywell.com/ast | 2

INTELLIGENT SERIES GAS SENSORS (iSERIES)iO2 SERIESOEM code(First layer)

Password iscustomisable.*(NoLock will be set
by default in casethe OEM lock is not
required)

No more than 6characters (ASCIIformat)üPartner code(Second layer)–

No more than 6 characters (ASCII format)

User factor 0: 100
User factor 1: 100
UF 2-3: Reserved
UF 4-9:Customisable–––––––––––
User factors can beadded to include
auto-compensation
for using different
membranes or
instruments

10 allocated slots–––––––––––
2 user factors are
already implemented(no additional
membrane andwith recommended
membrane), 2 arereserved and theremaining 6 can becustomised

OEM Lock
User Factor
Calibration
Alarms
Predictive
calibration
End of Life
Deadband
Bump DueDays

ü*

can be changed through thecommunication protocol by users

Configurable RangeiO2 parameters

Configurable: The parameter

Default Values

Customisable: Implemented
by Honeywell (Non-configurable
through the communication
protocol)TABLE 4. iO2 PARAMETERSNotes* OEM code will be set by Honeywell during sensor
manufacturing. Code to be provided by OEMü

Once this code has been set by user, it is notpossible to change it.

ü*** User factor 0 and 1 programmed into the sensor
during manufacturing. Additional User Factors
can be added to the selectable list during themanufacturing process. This user factor has to beprovided by the user.
** Users can select the desired user factor fromthe selectable list

Zero (fresh air)

20.9% O2üCalibration is performed at two points throughout
the operating range of the sensor. The calibration
points are defined by the zero and span values.
The zero value represent the response of thesensor in clean air (20.9 % O2)

Span0% O2

ûSpan is the calibration point that is done in theabsence of oxygen (i.e. N2)

Low

19.5% O2

ü

Indicates a concentration level below clean air

High

23.5% O2

ü

Indicates a concentration level above clean airCountdown
timer (Cal duedays)

180 daysü

The recalibration alarm will be triggered when thecountdown timer is reached

Limit LOW lower: 0.5
Limit LOW upper: 25
Limit HIGH lower: 0.5
Limit HIGH upper: 25

The EoL alarm will be triggered when the countdown or the future prediction conditions are met
The alarm is triggered when the sensor is too dry
Future predicûor too wet (electrolyte concentration is above ortion algorithm
below limits)
Countdown
The countdown timer is set for 1825 days, i.e. 5
û1825 days
timer
years
With the deadband enabled the sensor will notread changes until the concentration reaches
the deadband value. Is normally used to preventüüActive by default
measurement oscillations. The baseline of thedeadband is 20.9 % O2 (the reference is ambientair). This function can be configured to different
limitsWhole measurement
Consultiseries appendix 1 (technicalü
Incoming
0.1% O2rangecommunication) section 4.2 for information
about these parametersüOutgoing
0.3% O2
Incoming < Outgoing
1 dayA bump test is a brief exposure of the sensor to thetarget gas. The test has the objective of verifying
üthat the sensor responds and the instrument acts
accordingly. The sensor will tell the user when thebump interval has been exceeded
iO2 Series Gas Sensor Datasheet | sps.honeywell.com/ast | 3INTELLIGENT SERIES GAS SENSORS (iSERIES)iO2 SERIESTABLE 5. INTRINSIC SAFETY CERTIFICATIONSIntrinsic Safety
Entity Parameters

Ui = 5.88 V, Ii = 1.1 A, Pi = 1.2 W, Ci = 13.14 uF, Li = 0 uH

Intrinsic Safety
Rating

IIC T4, ia, 60°C

ATEX Marking

I M1
II 1G
Ex ia I Ma
Ex ia IIC Ga

Poisoning
Gas sensors are designed for operation in a wide range of environments and harshconditions. However, it is important that exposure to high concentrations of solvent
vapours is avoided, both during storage, fitting into instruments, and operation. Whenusing sensors with printed circuit boards (PCBs), degreasing agents should be used
before the sensor is fitted.
Do not glue directly on or near the sensor as the solvent may cause crazing of theplastic.

iO2 Series Gas Sensor Datasheet | sps.honeywell.com/ast | 4

WARRANTY/REMEDY
Honeywell warrants goods of its
manufacture as being free of defective
materials and faulty workmanshipduring the applicable warranty period.
Honeywell’s standard product warranty
applies unless agreed to otherwise by
Honeywell in writing; please refer to yourorder acknowledgment or consult yourlocal sales office for specific warranty
details. If warranted goods are returned
to Honeywell during the period ofcoverage, Honeywell will repair or replace,at its option, without charge those items
that Honeywell, in its sole discretion,finds defective. The foregoing is buyer’ssole remedy and is in lieu of all otherwarranties, expressed or implied,
including those of merchantability
and fitness for a particular purpose.
In no event shall Honeywell be liablefor consequential, special, or indirect
damages.
While Honeywell may provide application
assistance personally, through ourliterature and the Honeywell web site, it
is buyer’s sole responsibility to determine
the suitability of the product in theapplication.
Specifications may change without
notice. The information we supply isbelieved to be accurate and reliable as ofthis writing. However, Honeywell assumes
no responsibility for its use.

Honeywell
Advanced Sensing Technologies
830 East Arapaho Road
Richardson, TX 75081
sps.honeywell.com/ast

002708-3-EN | 3 | 11/21© 2021 Honeywell International Inc. All rights reserved.

m WARNINGMISUSE OF
DOCUMENTATION••

The information presented in thisproduct sheet is for reference only.
Do not use this document as a
product installation guide.
Complete installation, operation,and maintenance information
is provided in the instructions
supplied with each product.

Failure to comply with these
instructions could result in death orserious injury.

SAFETY NOTEThis sensor is designed to be used insafety-critical applications. To ensurethat the sensor and/or instrument inwhich it is used, are operating properly, itis a requirement that the function of thedevice is confirmed by exposure to target
gas (bump check) before each use of thesensor and/or instrument. Failure to carryout such tests may jeopardize the safety ofpeople and property.

Under no circumstances should intelligent
sensor pads be soldered to, as this cancause leakage of electrolyte. Connection
should be made via a mounting socket andspring connector.

WARNING: SOLDERING TO
PADS WILL RENDER YOURWARRANTY VOID.