1. Lecture Notes V Oxygen sensors based on oxygen ion conductors

2. Dependence of domain boundaries on oxygen pressure and temperature PpPp PpPp PnPn PnPn Ionic domains p-cond. n-cond

3. Function / 4F Porous Pt electrodes – reactions takes place in triple points 1

4. Calibration curve Short circuit due to electronic conduction

5. High temperature oxygen sensors Temperature range: 600 - 1500ºC Pressure range becomes smaller with increasing temperature. Good resistance toward corrosive atmospheres. Good temperature shock resistance. It is the equilibrium oxygen pressure which is measured!

6. In-situ measurements Examples: - Combustion control in gas- and coal fired furnaces; -Atmosphere control in sintering and heat treatment furnaces. - Combustion of waste;

7. In-situ oxygen control in molten steel. Electrolyte, Belgium

8. - sensor Catalytic emission-control Engine Exhaust Control unit

9. Cross section of λ-sensor

10. Extractive control of welding gases TIG- tungsten inert gas welding Argon Gas on backside must be controlled. Welding of stainless steel.

11. Extractive control of welding gases TIG- tungsten inert gas welding Argon PBI-Dansensor

12. Atmosphere control Fluid N 2 850 m 3 /h Nitrogen freeze dryer

13. Extractive quality control Packed meat and vegetables. PBI-Dansensor

14. Repetition How function an oxygen sensor? Typical applications of oxygen sensors.