| 摘要 |
PROBLEM TO BE SOLVED: To provide a technique capable of appropriately detecting characteristics of liquid using an electrode pair.SOLUTION: A sensor device 10 comprises substrates 11 and an electrode pair 21, 31. One of the electrode pair 21 is arranged on a surface 20 of the substrate 11. The other of the electrode pair 31 is arranged on a rear surface 30 of the substrate 11. Both capacitance of the one of the electrode 21 on the surface 20 and capacitance of the other of the electrode pair 31 on the rear surface 30 are correlated with the concentration of ethanol contained in mixed fuel. |
