Patent ID: 7971425
Filing Date: 2011-07-05
Classification: B01D,F01N,G01N,Y02A,Y02T

Abstract:
1. An apparatus for identifying a concentration of a urea of a urea solution, comprising: a urea concentration identifying chamber for causing an identified urea solution introduced into a urea concentration identifying apparatus body to stay temporarily; a urea concentration identifying sensor heater provided in the urea concentration identifying chamber; and a liquid temperature sensor provided in the urea concentration identifying chamber apart from the urea concentration identifying sensor heater at a constant interval; the urea concentration identifying sensor heater including a heater and an identifying liquid temperature sensor provided in the vicinity of the heater, and an identification control portion for applying a pulse voltage to the urea concentration identifying sensor heater for a predetermined time, heating the identified urea solution staying temporarily in the urea concentration identifying chamber by the heater and identifying the concentration of the urea with a voltage output difference V wherein the liquid temperature sensor is constituted to come in contact with the identified urea solution through a fin.