| 摘要 |
PURPOSE: To prevent a generating effect interfering with measurement by providing an external electric connection between a noble metal ring of positive electrode and an Ag/AgCl reference. CONSTITUTION: A pH electrode 5 provide for measuring CO2 concentration is surrounded by an annular groove acting as electrolyte storing vessel, and a positive electrode 3 is formed of a ring-shaped thin noble metal coating, which surrounds the insulating material of a small-sized negative electrode 1, and electrically separated from an Ag/AgCl reference 2 by an insulating layer 3a. The positive electrode is conduced to the end part of a PO2 /POC2 measurement sensor separated from a measuring surface by the ring 3 connected as the sheath-like package of the negative electrode axially at a right angle. A groove-shaped dent 4 as electrolyte storing vessel is set in a radially outside position. Thus, the electrolyte storing vessel is enlarged, and the heating area near the negative electrode is extended. |
