Oxygen sensor

Depending on sensor type, SENSORE’s oxygen sensors enables oxygen measurement of between 10 ppm and 96% oxygen in gaseous media

Operation of amperometric oxygen sensors is based on an electrochemical zirconium dioxide pump cell. If voltage is applied to the cell, oxygen ions are pumped from the cathode to the anode. Covering of the cathode with a gas diffusion barrier creates saturation voltage, which measures oxygen concentration in the environment. Since the property of oxygen ion conductivity does not occur below approx. 400°C, the sensor has to be heated accordingly. Due its operating mode, the sensor does not require reference gas.

Characteristics

  • wide measurement range of 10 ppm up to 96% oxygen

  • high accuracy

  • almost linear characteristic for many sensor types

  • low temperature dependence of sensor signal

  • low cross-sensitivity to other gases

  • long product life

  • in many cases “Single point calibration” required only once