LIQUID TYPE IDENTIFICATION DEVICE

摘要

There is provided an identification device capable of accurately, rapidly, and easily identifying a hydrocarbon-based liquid and alcohol-based liquid. An identification sensor unit (2) is arranged to face a flow passage (20) of a liquid to be measured and includes an indirect heating type liquid type detection unit (21) having a heating body and a temperature-sensitive body, and a liquid temperature detecting unit (22) for detecting the temperature of the liquid to be measured. The identification sensor further includes an identification calculation unit for applying a single pulse voltage to the heating body of the liquid type detection unit (21) so as to generate heat and identifying the liquid to be measured according to an output of a liquid type detection circuit formed by the temperature-sensitive body of the liquid temperature detecting unit (21) and the liquid temperature detection unit. The identification calculation unit identifies the liquid to be measured according to a liquid-type-corresponding first voltage value corresponding to a difference between the initial temperature of the temperature-sensitive body when the heating body generates heat and a first temperature at the moment when a first time has elapsed from the start of application of the single pulse and a liquid-type-corresponding second voltage value corresponding to a difference between the initial temperature of the temperature-sensitive body and a second temperature at the moment when a second time longer than the first time has elapsed from the start of application of the single pulse.