This detection method is based on the effect of magnetic lines of flux on oxygen molecules. The oxygen molecules tend to pool around the high intensity flux lines. A test body (a.k.a., dumb-bell), filled with nitrogen, is placed within the high intensity lines of flux; as the concentration of oxygen increases from 0.00% to 100.00%, the bouyancy of the nitrogen filled spheres increases as oxygen concentration increases. The force developed by the bouancy is measured and a proportional signal is developed.
Oxygen concentration derived from a proportional current flow between the anode and cathode in an electrochemical cell.