| 摘要 |
<p>The disclosed oxygen concentration detector includes a plurality of resistive bodies (6, 7) at least one (7) of which forms an oxygen concentration cell, and means (14) for applying an alternating current of a specific frequency to a selected resistive body (6) via electrodes (10, 11) so as to raise the temperature thereof, said selected resistive body (6) being adapted to heat the oxygen concentration cell (7). The specific frequency is in a range such that the impedance of the body (6) is largely independent of the interface capacitance between the electrodes (10, 11) and the body (6). Also provided are a D.C. source (18) and means (19) for measuring the D.C. potential across the cell.</p> |
