| 摘要 |
PROBLEM TO BE SOLVED: To avoid standing of bubbles in a fluid within a sensor. SOLUTION: A first substrate 1 is provided with a detection electrode 16 while a second substrate 2 is provided with a boss part 4 oppositely to the detection electrode 16 and a measuring recess 3 is made around the boss part 4. The second substrate 2 is further provided with passages 6a, 6b interconnecting the measuring recess 3 and the outside so that a fluid can flow into the measuring recess 3 through the interconnecting passages 6a, 6b. Furthermore, bubble discharging passages 10a, 10b communicating the measuring recess 3 are provided substantially oppositely to the interconnecting passages 6a, 6b so that bubbles generated in the measuring recess 3 can be discharged to the outside through the bubble discharging passages 10a, 10b.
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