What Are Oxygen Measurement Principle of Zirconia Oxygen Analyzer

What Are Oxygen Measurement Principle of Zirconia Oxygen Analyzer

The Working Principle of Zirconia Oxygen Analyzer

Zirconia as a solid electrolyte, high temperature electrolyte on both sides of the oxygen concentration is different at the same time to form a concentration cell. The concentration of oxygen on both sides affects the potential generated by the concentration cell, such as when the oxygen concentration on one side is fixed. You can measure the other side of the oxygen content through the measurement of the output potential. Under the high temperature of 600~1200℃, the zirconia material after high temperature roasting has good conductivity to oxygen ions.

The zirconia is a high-temperature electrolyte concentration cell, which has the ability to generate the conductivity of oxygen ion migration at high temperatures of several hundred degrees.

As the measured gas (flue gas or other gases) and the reference gas (air or other gases) in the zirconia on both sides of the platinum electrode oxygen partial pressure is different, there is a certain number of oxygen ions migrate and produce a

Due to the different oxygen partial pressures of the measured gas (flue gas or other gases) and the reference gas (air or other gases) at the platinum electrodes on both sides of the zirconia, there is a certain number of oxygen ions migrating between the two electrodes, which generates an oxygen concentration potential.

The relationship between the potential value and the oxygen concentration can be expressed by the Nernst formula:


Where: E-oxygen concentration potential (V)

R-ideal gas constant (8.314J/moLK)

T-absolute temperature value (K)

F-Faraday constant (96500c/moL)

P1-Partial pressure of reference gas (air)

P2-partial pressure of the measured gas

The transmitter takes the measured data, converted by the microcontroller calculation, and displays the oxygen content on the LCD screen, and at the same time converts it into a current signal for the use of computer or meter.

Ziconix Oxygen Analyzer

The Structure of Detector

The detector consists of dustproof device, zirconia tube, heating furnace, thermocouple, gas conduit, junction box and shell and other major components. The whole device adopts fully closed structure to increase the sealing performance of the whole device and improve the service life. For high dust detection environment, a porous ceramic filter is added to achieve better filtration effect.

The zirconia tube inside the detector is the core component, which is a fragile ceramic product, and should be avoided during transportation and installation to avoid severe vibration, so as to avoid damage. The role of the detector heating furnace is to provide the zirconia components required for normal operation of the temperature, in order to extend the life of the heating furnace, in the process of special treatment. The detector itself has a heating device, so that it can work normally in an environment of less than 700 ℃.

The structure of Detector

The Precautions for Use

Pay attention to the following matters when using:

In order to avoid the impact of incorrect tube connections leading to tube rupture or damage, do not use a large flow rate. The flow rate is generally recommended to be set to 500 mL/min. Use a step-by-step leak detection method to check the gas tightness and determine whether there is a gas leakage or a tube rupture. To inspect for potential wrong tube connections, remove the component and check the tee connector. There are two places prone to leakage: one is the flowmeter, and the other is the lead oxide tube.

First, pass a trace amount of gas through the system so that the flow rotor rises to the top of the full scale. Then, block the gas outlet of the flow meter. If the flow rotor does not come down, it indicates that the flow meter is leaking. If the blocked instrument outlet rotor does not come down, it indicates a ruptured wrong tube.

BCST Zirconia Oxygen Analyzer


The Advantages of BCST Zirconia Oxygen Analyzer:

  • High-precision measurement is possible:

It adopts advanced zirconia ceramic sensor, which can accurately measure the oxygen content in the gas with high precision.

  • Analyzer stability:

BCST zirconia sensor has a long life, good stability, not easily affected by temperature, pressure and other factors, can

  • It can be long-term stable operation, anti-interference ability:

BCST zirconia oxygen analyzer has strong anti-interference ability, can exclude the interference of other gas components on the measurement, improve the accuracy of the measurement.

The Application of BCST Zirconia Oxygen Analyzer

Many industries, including air separation for nitrogen, the smelting industry, medical and health care, the petrochemical industry, and electronic power, widely use the BCST zirconia oxygen analyzer for on-line detection and analysis of oxygen content.

  • Energy industry.

In coal-fired power plants, gas turbine power plants, and other energy fields, operators use zirconia oxygen analyzers to monitor the oxygen content in the flue gas. This helps optimize the combustion process, improve energy efficiency, and reduce pollutant emissions.

  • Chemical industry.

In the chemical production process, the control of oxygen concentration is crucial to ensure product quality and safe production.

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