LIQUID CONCENTRATION DETECTION APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a liquid concentration detection apparatus capable of detecting a concentration of a specific component in a liquid and a liquid level by the same detection part.SOLUTION: When a fuel temperature T detected by a thermistor 19 attached to a warning detection electrode 15 is a temperature indicating that a fuel is reduced lower than a warning liquid level, a CPU 32 turns on a warning lamp 42 to perform residual quantity warning (S5). The CPU 32 detects reference capacity C&egr; by an exposure detection electrode 15a formed on the tip side of the warning detection electrode 15 (S6) and calculates an ethanol concentration E on the basis of the temperature T and the reference capacity C&egr; (S8). The CPU 32 detects electrostatic capacity Cby a liquid level detection electrode 9, calculates a liquid level L by using the reference capacity C&egr; (S10) and instructs an indicator 41c in a meter 40 to indicate the liquid level (S11).