Gas Analysers
ZrO2 - zirconia oxygen analysers
Established over decades of experience, ZrO2 technique for measuring O2 in hot process gases is well established. Innovation and control of materials composition has resulted in application specific adaptation and specialism particularly in the field of high temperatures
Low temp (0-700 degC)
High temp (500-1600 degC)
Low/High temp (200-1200 degC)
High temp/ATEX controller (500-1600 degC)
ZrO2 - zirconia oxygen analysers
Zirconium oxide (ZrO2)-based cells use an electrochemical principle to measure the concentration of oxygen
in gases. Their operation is based
on a few key properties:
1. Ionic conductivity
2. Separation properties
3. Oxygen partial pressure difference:
4. Electromotive Force Generation
Overview
Zirconium oxide (ZrO2)-based cells use an electrochemical principle to measure the concentration of oxygen in gases. Their operation is based on a few key properties:
1. Ionic conductivity: At high temperatures (over 500°C), yttria stabilized ZrO2 (YSZ) exhibits high ionic conductivity for oxygen ions.
2. Separation properties: ZrO2 acts as an oxygen ion permeable membrane, separating two chambers: –
Reference chamber: Exposed to a gas with known oxygen concentration(ambient air) – Measuring chamber: Exposed to the gas to be analyzed.
3. Oxygen partial pressure difference: A partial pressure difference of oxygen is created between the two chambers which induces the migration of oxygen ions through the ZrO2 membrane.
4. Electromotive Force Generation (FEM): The migration of oxygen ions generates an electric current proportional to the partial pressure difference of oxygen. This FEM is measured as a useful signal.
Completely designed and manufactured by Fer Strumenti
+ Possibility of having two probes connected to the same electronic unit
+ Dual analog outputs for second O2, Temperature
+ Cell galvanic regeneration circuit integrated into the transmitter
+ Very useful for NOx containment
+ High response speed
+ Resistant to hostile and dusty atmospheres
+ Ideal for automatic combustion control
+ Full in-situ, without internal circulation
+ Available accessories for automatic mounting with plant running