US 2009/0268779 A1 · TEMPERATURE SENSOR ELEMENT AND METHOD OF MANUFACTURING THE SAME

Abstract

A temperature sensor element 10 has a reduced thermal conduction path from a measurement object to a sensitive end portion 22 of a thermocouple 21 and a high-dense insulating ceramic base body 20. Since the temperature sensor element 10 has excellent thermal conductivity from the measurement object to the sensitive end portion 22 of the thermocouple 21, it is also excellent in responsiveness at the time of temperature detection. Further, corrosion and material deterioration of the thermocouple 21 is unlikely to occur because the thermocouple 21 does not directly contact the measurement object (exhaust gas). As a result, the temperature sensor element 10 exhibits excellent durability. Therefore, the temperature sensor element 10 exhibits a good responsiveness at the time of temperature detection as well as excellent durability.

Claims8

Dependent claims

A temperature sensor element, comprising:

an elongated sintered body extending in an axial direction, said sintered body having an outer surface for exposure to a matter to be measured, said sintered body being formed by sintering insulating ceramic material;
a sensitive member embedded in the sintered body;
and
a signal output portion formed on a rear end side of the sintered body for outputting an electric signal received from the sensitive member to the outside,
wherein the sensitive member is comprised of a thermocouple embedded in the sintered body in a state that a detection end portion is disposed on a front end side of the sintered body in the axial direction, and
wherein the sintered body is in contact with the detection end portion of the sensitive member and is a dense material which has gas impermeability in a region from an outer surface of the sintered body to the sensitive member.

3 more elements

Dependencies are inferred from the claim text.

Temperature sensor element and method of manufacturing the same

Life of this patent

Temperature sensor element and method of manufacturing the same

Life of this patent

Abstract

Claims8