Patent ID: 7712363
Filing Date: 2010-05-11
Classification: F01N,G01F

Abstract:
1. A liquid state detecting sensor for detecting a state of a liquid accommodated in an accommodating container, comprising: a level detecting unit having a first electrode and a second electrode extending in a longitudinal direction and configured to form a capacitor whose electrostatic capacity changes between the first electrode and the second electrode in correspondence with a level of the liquid accommodated in the accommodating container; a mounting part located on a rear end side in the longitudinal direction of the level detecting unit and adapted to mount the liquid state detecting sensor in the accommodating container; a liquid property detecting element connected to the level detecting unit in an insulated state and adapted to detect at least a concentration of a particular component contained in the liquid, the liquid property detecting element having a leading end located closer to a leading end of the liquid state detecting sensor than a longitudinal leading end of the level detecting unit and having a heat generating resistor pattern whose resistance value changes in correspondence with a temperature of the heat generating resistor pattern, the heat generating resistor pattern being located closer to the leading end of the liquid state detecting sensor than the longitudinal leading end of the level detecting unit; and a detection circuit for detecting a concentration of the particular component contained in the liquid on the basis of a change of an electric property of the heat generating resistor pattern.