| 摘要 |
PURPOSE:To make it possible to rapidly obtain an oxygen concn. detection value high in accuracy corresponding to the concn. of oxygen in gas to be measured even if said oxygen concn. is changed, by detecting a gas component from the relation of a current and voltage between electrodes of other hollow body. CONSTITUTION:A current supply means 11 is connected between the electrodes 5, 6 of one hollow body 2 so that a constant current flows from the electrode 6 to the electrode 5 while a power source 12 is connected between the electrodes 7, 8 of the other hollow body 4 so as to be capable of flowing an arbitrary current amount from the electrode 7 to the electrode 8 and, when voltage is applied by the power source 12 snd voltage and current between the electrodes 7, 8 are measured, a measuring result is obtained. Each of the hollow bodies 2, 4 only forms a rectangular parallelepiped opened in one direction and the production thereof is easy while, because oxygen gas supplied from the hollow body 2 to a gap part 3 is the open air flowed in from an opening part 2a and high in oxygen concn., a power source 11 requires no power and oxygen can be flowed into the gap part 3. |
