Oxygen Zirconia In-situ analyser

In-situ zirconium oxygenanalysers are used to measure oxygen levels and control combustion in furnaces and boilers. O2 gas analysers are used to regulate the air-fuel ratio of burners in a controlled system to ensure an efficient process. These analysers are ideal for controlling and optimizing excess air in combustion. These measuring instruments enablesignificant fuel savings.

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Fuji Electric gas analysers

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Oxygen analyser : Optimizing combustion efficiency and complying with environmental standards

oxygen analyser combustion efficiency optimization

Ideal for combustion control in boilers, incinerators and furnaces, an oxygen analyser helps reduce CO₂, SOx and NOx emissions while saving your energy.

This gasanalyser is specially designed for continuous measurement of oxygen concentration in flue gases and smoke from boilers in power plants, industrial furnaces plants (cremation, glassmaking, baking) and incinerators plants.

These zirconium oxide oxygen measurements are used to regulate the air-fuel ratio of burners in a controlled system to ensure optimum process efficiency in an industrial plant.

This instrument is ideally suited to controlling and optimizing excess air in combustion. As a result, it offers significant savings in fuel consumption.

combustion air excess control and optimization

operating principle diagram

Operating principle of in-situ zirconium oxygen analysers

The operation of in-situ oxygenanalyser relies on the property of zirconium oxide, which conducts oxygen ions when heated.

This analyser obtains the measurement of O₂ concentration by detecting the electromotive force generated by the difference in O₂ content between air and sample gas.

o2 sensor principle

Oxygen analysers applications with zirconium oxide probe

oxygen analysers applications

Thezirconium ATEX oxygenanalyser is suitable for combustion control in safety zones with potentially explosive atmospheres. These analysers comply with the most demanding international standards. They are CE, UL, CSA, ATEX and QAL1 certified.

gas analyser for combustion


Advantages of oxygen analysers

advantages of oxygen analysers
  • Excess combustion air reduction
  • Saves fuel by increasing combustion efficiency
  • Combustion plant longevity
  • Quick and easy zirconia element replacement
  • Safety and a high degree of protection
  1. Thermocouple cut-off detection for temperature regulation in the detector byanalyser power supply cut-off.
  2. In the event of an emergency, the power supply to the detector can also be switched off via an external input.
  3. Locking function prevents operating errors

Why choose an in situ oxygen analyser with zirconium probe? 

why choose u in situ o2 analyser with zirconium probe

The in-situ O2analyser with zirconia probe offers an accurate measurement of ± 1% on the measured oxygen concentration. It is also highly stable over time, thanks to its zirconia probe technology. This system is suitable for processes involving high temperatures of up to 1500°C, depending on the type chosen.

This probe is a highly reliable and robust instrument, which can be used in the most difficult conditions (dust, smoke, etc.). Its construction with resistant materials such as 316L stainless steel guarantees excellent resistance to damp and corrosive atmospheres.

The zirconium oxideanalyser features a backlit LCD display for easy reading of results, even in the darkest conditions.

The transmitter also features an audible and visual alarm when preset thresholds are exceeded.

Among other benefits, they offer:

in situ zirconia probe applications diagram

Specifications

Operating principle and application

At the heart of this instrument, the in-situ zirconia sensor guarantees fast, accurate oxygen measurement. Mainly dedicated to O2 measurement in non-combustible gas mixtures, this analyser is particularly well suited to critical environments such as industrial heat production in refineries, petrochemical reactor furnaces, and other large combustion plants.

Exceptional Performance

The user-configurable measurement scale ranges from 0 to 2% up to 50% vol. oxygen. Exceptional repeatability of ≤ ± 0.5% PE and linearity of ≤ ± 2% PE ensure consistent, accurate performance under varied operating conditions.

Reactivity and Advanced Communication

With a fast response time of 4 to 7 seconds to reach 90% of response, theanalyser offers near-instantaneous measurement to adapt to rapidly changing conditions. Analog output of 4-20 mAdc or 0-1 Vdc offers flexibility in data collection. In addition, contact outputs include 6 points with SPST-NO contacts for crucial functions such as high/low limit alarm, maintenance in progress, purge in progress, calibration in progress, andanalyser faults.

Integrated Security and Advanced Options

Integrated safety functions, such as power cut-off in the event of thermocouple failure, add an extra layer of protection. The lockout function prevents potential operating errors. Advanced options include combustion efficiency display, cleaning, automatic calibration, selector valve and flowmeter, providing further customization to the specific needs of each application.

Installation and power supply

Theanalyser offers installation flexibility with panel- or pipe-mounting options. The cable length between controller and detector can be up to 100 meters, offering adaptability to various factory configurations. Power can be supplied at 100-120 Vac or 200-240 Vac, at a frequency of 50/60 Hz, guaranteeing worldwide compatibility.


Depending on your process requirements, you can combine the following modules

combine modules

Oxygen analysers selection chart

The table below helps you to select the right models and to combine the required modules according to process conditions.

Process conditionsModule selection
Application exampleTemperatureDustTube materialUncloggingTube typeTube code (*)Detector type
Gas boiler≤ 600 °C≤ 0.1 g/Nm³SS316NoStandard convection tube631B562-0#ZFK8
Biomass, oil, coal boiler/ Incinerator≤ 600 °C≤ 5 g/Nm³YesConvection tube with cleaning device631B563-0#
≤ 25 g/Nm³YesDirect tube for very dusty gases (HP)631B673-0#
YesDirect tube for HP with deflector631B677-0#
≤ 1000 °C≤ 0.2 g/Nm³SS310NoDouble-flange convection tube (DB) for high-temperature gases (HT)631B685-0#ZFKH
≤ 5 g/Nm³YesConvection tube DB HT with cleaning device631B684-0#
≤ 25 g/Nm³YesDirect tube for HT and HP631B675-0#
YesDirect tube for HT and HP with deflector631B678-0#
Incinerator / Furnace / Glass / Metallurgy≤ 1300 °C≤ 0.2 g/Nm³KanthalNoConvection tube for very high-temperature gases631B682-0#
≤ 5 g/Nm³YesConvection tube for high-temperature gases with cleaning function631B683-0#
≤ 800 °C≤ 0.5 g/Nm³SS310YesEjector module ZTAZTA2ZFK8
≤ 1500 °CSiCYesEjector module ZTAZTA1
Remarks(*) The last digit of the tube code corresponds to the tube insertion length, as shown below:
"1" = 300 mm"2" = 500 mm"3" = 750 mm"4" = 1000 mm"Z" = specific length -> consult Fuji

Notes :

- In case of very humid gas, keep the flange at a sufficient temperature to prevent condensation
- In case of very corrosive gas, consult Fuji for the materials to be used
- If the gas flow is less than 5 m/s, use an ejector module instead of a convection tube.


How do I choose my in situ oxygen analyser with zirconium probe? 

Do you need to measure oxygen levels in your industrial process?

how to choose my oxygen analyser

We help you configure your oxygen measurement platform for :

  • Combustion control
  • Safety measures
  • Environmental monitoring
  • Furnace atmosphere control
  • Inerting process
  • Other industrial processes

With the data from this questionnaire, our engineers will select the best combination for reliable and accurate oxygen analysis. Please do not hesitate to send us, in writing or in the form of a diagram, on the last page of this questionnaire or as an attachment, any additional information that would enable us to understand the specifics of your process, and thus best adapt the configuration of your O2 analysis.

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Application questionnaire O2 zirconia analyser

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Immediate combustion optimization guaranteed with Fuji Electric in situ oxygen analysers !