Micro Fuel Cell Measures Oxygen Concentration
Oxygen makes up about 21 % of the air in the atmosphere. Normally we take this for granted but for some, oxygen concentration can be a matter of life and death. For a diver it is essential to know the oxygen concentration in the breathing gas in his cylinder, and a cave explorer needs to know the oxygen level in the ambient air he is breathing. This article describes an oxygen concentration sensor and how to process its output.