O2.IQ oxygen analyzer
packaged solution
Features

O2.IQ simplifies and standardizes your options for reliableoxygen measurement in a variety of applications. At theheart of this package is the oxy.IQ analyzer supported
by a sample conditioning system purposefully designed
to maintain ease of access and functionality in a spaceconscious housing. Simply mount the O2.IQ, connect tothe two terminals and the analyzer is ready for its fieldcalibration. Key highlights include:• Wall mounted NEMA 4X and IP66 stainless steel package• Features the oxy.IQ electrochemical analyzer• Package designed with ease of access including
accessibility to sensor cell replacement• Sample conditioning system provides isolation, filtration,pressure regulation, flow and pressure indication alongwith a clear window for easy viewing of all readings.

Applications

The standard O2.IQ package has been designed withoxygen measurement in natural gas pipelines in mind;
however, the package is easily transferrable to a wide range
of applications, given its standard sampling conditioning
system. The pressure regulation functionality allows for
inlet pressures of up to 400 psig (27.5 bar) and reduces toambient pressure for accurate measurement.
The compact footprint of this stainless-steel package
combined with the loop powered oxy.IQ analyzer make it
perfect for safe and hazardous area locations. Markets andapplications served include:• Industrial gas production• Natural gas• Petrochemical• Heat treating and annealing• Inert weld gases• Gaseous hydrocarbon streams

Ordering configuration

The O2.IQ is available in 7 different off-the-shelf configurations covering general purpose to hazardous area requirements,
barrier types and metric or imperial fittings. The selection grid highlights the ordering part number which corresponds to thefeatures required for your application and relevant area classification.

Fitting selection
Ordering Part No.

Imperial

O2.IQ-CL1-DIV1-Z✔

O2.IQ-CL1-DIV1-G
O2.IQ-CL1-DIV2Metric

O2.IQ-GP-IGeneral
purposeIntrinsicallysafe global

Class 1 Div 1✔

✔

✔
✔

O2.IQ-IS-Z
O2.IQ-IS-G

Area classification✔

O2.IQ-GP-M

✔
✔

✔

✔

✔

Class 1Div 2 Non
incendive

Zenerbarrier✔

Galvanicisolator✔

✔

✔

✔

✔

✔

Barrier type✔

✔

Ordering Part No.

The O2.IQ also requires selection of theappropriate electrochemical OX sensor
for the oxy.IQ. Ordering configurations
for the OX sensors are as follows andplease refer to the sensor interference
gases for further information.

SummaryOX-1

Low range ppm measurement, standard background gases

OX-2

Low range ppm measurement, acid background gases

OX-3

Percent measurement, standard background gases

OX-4

Percent measurement, acid background gases

OX-5

Low/mid-range ppm measurement, standard background gases

Oxygen sensor interference gases
Gas

OX-1 and OX-5

OX-2

H2S

<5 ppmSO3

OX-3

OX-4

ContinuousIntermittent (1)ContinuousIntermittent (1)<10 ppm

0.0005%0.01%

0.001%

0.1%<10 ppm<10 ppm

0.01%

0.1%

0.01%

0.1%

SO2

<10 ppm

(3)

0.01%

0.1%

(3)

(3)

HCl

<1000 ppm

(3)

0.1%

1.0%

(3)

(3)

HCN

<1000 ppm

(3)

0.1%

1.0%

(3)

(3)

CO2

<1000 ppm

(3)

0.1%

20 &(3)

(3)

NO2

(2)

(2)

(2)

(2)

(2)

(2)

Cl2

(2)

(2)

(2)

(2)

(2)

(2)

(1) Recommended maximum exposure 30 minutes, followed by flushing with ambient air for an equal period.
(2) Minimal effect on sensor performance, but produces signal interference of 1:2 ratio for ppm levels only (e.g., 100 ppm NO2 looks like 200 ppm O2).
(3) Minimal effect on sensor performance.

Application parameters• Sample gas pressure: 0 - 400 psig (0 - 27.5 Bar)
• Sample gas temperature: 32 to 113°F (0 to 45°C)• Power requirements: 24 to 28 VDC at 50 mA

O2.IQ specifications
All installations
Accuracy

European compliance• ±1% of range at calibration point

Complies with EMC directive 2004/108/EC• ±2% of range at the calibration point for the 0 to 10 ppmv
range (OX-1 or OX-2 only)

User-selectable measurement range
and corresponding sensor

Repeatability• ±1% of range

Oxygen content• ±2% of range for the 0 to 10 ppmv range (OX-1, OX-2 only)

0 to 10 ppmv

Resolution

0 to 20 ppmv

• ±0.1% of range

0 to 50 ppmv

Linearity

0 to 100 ppmv

• ±2% of range (OX-1, 2, 3, 5)

0 to 200 ppmv

• ±5% of range (OX-4)

0 to 500 ppmv

O2 Sensor operating temperature

0 to 1,000 ppmv

32 to 113ºF (0 to 45ºC)

0 to 2,000 ppmv

Sample pressure

0 to 5,000 ppmv

Max inlet pressure 400 psig (27.5 barg) vented toatmospheric

0 to 10,000 ppmv

Atmospheric pressure effect0% to 1%
0% to 2%±0.13% of reading per mmHg (directly proportional toabsolute pressure). During calibration, pressure and flow
must be kept constant.

0% to 10%Process connection

0% to 25%

1/4 in./6 mm compression tube fittings inlet and outlet

0% to 50%

Dimensions
10.0 x 8.0 x 5.32 in (273.1 x 203.2 x 135 mm)
Weight15.0 lb (6.8 kg)
Sample flow rate
1.0 SCFH (500 cc/min) recommended for process units
Electrical classification certification
Intrinsically safe
• USA/Canada• IS for Class 1, Groups A, B, C, D, T4• AEx ia IIC T4• ATEX and IECEx• Ex ia IIC Ga T4 Tamb -20 to 60ºC
IS package, non-incendive without use of Zener barrier orgalvanic isolator:• USA/Canada: Class 1, Div 2, Groups A, B, C, D: T4

0% to 5%

OX-1 andOX-2✔

OX-3 andOX-4

OX-5✔
✔
✔

✔

✔

✔

✔

✔

✔

✔

✔

✔

✔
✔
✔

✔
✔

✔
✔
✔
✔
✔

✔
✔

Installation options

Class 1 Div 1/Zone 0 | Global intrinsically safe

Hazardous Location

Non-Hazardous Location
POWER SUPPLYZBB BUS BAR

(1)

BROWN
BLUE

3142

IS Cable(Blue Jacket)

GREEN
BLACK

GREEN

MTL7706

RED+24V
24V RETURN

IS GROUND

4-20MA ANALOG
INPUT DEVICE

Non-IS Cable(1)

R1Hazardous Location
Class 1 Div 2 - Non incendive

R2BLACK

1. Equipment connected to barrier
inputs must not use or generate
more than 250V.
2. Total load of R1 + R2 must equal
250 ohms ±5%.

Non-Hazardous Location
POWER SUPPLY(1)

BLUE+24V
24V RETURN

BROWN

BROWN

Black Jacket

4-20MA ANALOG
INPUT DEVICE(1)

Maximum load of analog input device isdependent on power supply voltage
and cable resistance.

General purpose

Non-Hazardous Location

POWER SUPPLY(1)

BLUE+24V
24V RETURN

BROWN

BROWN

Black Jacket(1)

Maximum load of analog input device isdependent on power supply voltage
and cable resistance.

Note: Wiring to integrated terminal strip to be completed at installation site. oxy.IQ connection cable ships separately.
(1)

Terminal strip and oxy.IQ connector are internal of the O2.IQ housing. Shown externally for illustration purposes only.

4-20MA ANALOG
INPUT DEVICEStart up procedure
Initial setup

Bringing process gas online• Ensure external wiring is securely connected to the terminal
strip provided in the O2.IQ and that the oxy.IQ cable issecurely fastened at the back of the transmitter and wired
into the terminal blocks provided. Pay special attention tobarrier installation and wiring if in hazardous area. (Seeoxy.IQ manual Section 2.2)

• Check that the needle valve is in the closed position andswitch the 3-way selection valve to point in the direction of
the process inlet connection• Referring to section 2.3 of the oxy.IQ user manual install theelectrochemical cell into the oxy.IQ• Follow the procedure set out in Sections 3.3.1 – 3.3.3 to set
up and perform initial air calibration of the unit
• On completion of initial setup, insert the oxy.IQ into its
manifold and ensure it is securely mounted in the O2.IQ
sample handling system

Span calibration• Check that the needle valve (4) is fully closed and thatthe pressure regulator (2) is backed out by rotating anticlockwise• Slowly open the needle valve to allow any trappedpressure and gas to vent to the outlet in the event the unit
was in use previously and was shut down for an extended
period• Switch the 3-way selection valve (1) to point in the directionof calibration inlet and attach the calibration gas to thecalibration gas inlet port
• Allow calibration gas to flow into the O2.IQ and slowly
turn the pressure regulator clockwise until the pressuregauge (3) reads 1-2 psig. Crack open the needle valve andmonitor the flow rate on the rotameter (7) and pressure on
the pressure gauge• Slowly adjust the needle valve until a steady flow rate of 1.0
SCFH (500 cc/min) is reached• Adjust until a steady flow rate of 1.0 SCFH (500 cc/min) anda pressure of 0 psig (14.7 psia) is achieved• Carry out span calibration as per Section 3.3.4 of the oxy.IQ
manual• When calibration is complete, switch the 3-way selection
valve to the central block position and fully close in theneedle valve while backing out the pressure regulator byturning anti-clockwise• With the process gas flowing to the system, slowly turnthe pressure regulator clockwise until the pressure gauge
reads 1-2 psig. Open the needle valve and monitor the flowrate on the rotameter and pressure on the pressure gauge• Slowly adjust the needle valve until the flow rate is steadyat 1.0 SCFH (500 cc/min)Shut down procedure• Slowly shut the needle valve until the flow rate on therotameter reads zero flow
• Switch the 3-way selection valve to the block position,
isolating the process gas• Re-open the needle valve to allow any trapped processpressure to vent to the outlet• Close the needle valve back in as added protection
against process gas pass through during shut down ormaintenance periods

Figure 2 - O2.IQ Diagram

Notes

1. The O2.IQ will ship with a standard oxy.IQ cable in separate
packaging. This offers the end user the capability of wiring
directly to their associated equipment if the terminal
strip is not required. All wiring should be carried out inaccordance with the wiring schematic shown and forthe appropriate area classification. Responsibility for thequality of workmanship will be with the end user.
2. The O2.IQ is a robust package with many potentialapplications. As with all analyzers however, it has certain
limitations beyond which could impact on the relibaility ofmeasurement and safety. If any question remains aroundthe suitability of the O2.IQ for a particular application thenPanametrics are happy to assist with our specialist teamof application engineers to support customers in theirselection process.
3. While the O2.IQ is a packaged solution which is ordered
under a single part number, the electrochemical oxygen
sensor must be ordered separately. The selection of
the OX sensor which is most suitable for the application
should be done in accordance with the selection table
included in this datasheet and/or in consultation withPanametrics sales support. The electrochemical sensors
which are determined by the OX preface will be shipped
as dangerous goods which is standard procedure for all
electrochemical sensors.

Panametrics, a Baker Hughes Business, provides solutions in
the toughest applications and environments for moisture,oxygen, liquid and gas flow measurement. Experts in flaremanagement, Panametrics technology also reduces flareemissions and optimizes performance.
With a reach that extends across the globe, Panametrics’
critical measurement solutions and flare emissions
management are enabling customers to drive efficiency
and achieve carbon reduction targets across criticalindustries including: Oil & Gas; Energy; Healthcare; Water andWastewater; Chemical Processing; Food & Beverage andmany others.
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BHCS34789		

(04/2023)

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