Oxygen Electrodes are subject to changes in diffusion resistance
A smarter solution
We use Phosphorescence Quenching, in which the phosphor is placed is placed in the medium of interest and then excited by absorbing a photon of light emitted from an LED. After absorption, the phosphor then returns to it’s ground state by emitting the light that was just absorbed,or by a non-radiative transfer of energy to other “quenching” molecules in the environment.
The OLIS process for oxygen measurement determines the oxygen concentration directly by determining the phosphorescence lifetime instead of intensity. Intensity is a relative measurement while the lifetime is an intrinsic molecular property which is (for the most part) independent of concentration.