Temperature Sensor

Patent metadata

Field	Value
Publication number	US-2016202128-A1
Application number	US-201614993675-A
Country	US
Kind code	A1
Filing date	Jan 12, 2016
Priority date	Jan 13, 2015
Publication date	Jul 14, 2016
Grant date	—

Abstract

To suppress a failure in a corrosive environment without reduction in a response of a temperature sensor to temperature changes, a temperature sensor is disclosed. The temperature sensor includes a protective pipe, a temperature sensing element, a wiring, and a gas barrier layer. The gas barrier layer is disposed between the temperature sensing element and the protective pipe and between the wiring and the protective pipe, covers the temperature sensing element and the wiring 103 in the protective pipe, and is made of a material having a gas permeability lower than the material of the protective pipe.

First claim

1 . A temperature sensor comprising:
a protective pipe having one end provided with a housing section, the protective pipe being comprised of a fluororesin; a temperature sensing element housed in the housing section of the protective pipe; a wiring connected to the temperature sensing element, the wiring being drawn from the other end of the protective pipe; a gas barrier layer disposed between the temperature sensing element and the protective pipe and between the wiring and the protective pipe, the gas barrier layer covering the temperature sensing element and the wiring in the protective pipe; wherein the gas barrier layer is comprised of a material having a gas permeability lower than that of a material of the protective pipe.

2 . The temperature sensor according to claim 1 , further comprising:
a resin mold section covering the temperature sensing element, a terminal section of the temperature sensing element, and an electric connection section between the terminal section and the wiring, the resin mold section being comprised of a fluororesin, wherein the gas barrier layer is formed so as to cover the resin mold section.

3 . The temperature sensor according to claim 1 ,
wherein the temperature sensing element and the wiring are constricted by the gas barrier layer in a tubular shape.

4 . The temperature sensor according to claim 1 ,
wherein the protective pipe is comprised of a tetrafluoroethylene-perfluoroalkoxyethylene copolymer resin or a tetrafluoroethylene-hexafluoropropylene copolymer resin and the gas barrier layer is comprised of polyvinylidene fluoride.

Assignees

• Azbil Corp

Inventors

• Kato Atsushi

Classifications

• G01K1/08 Primary

  Protective devices, e.g. casings · CPC title

• G01K1/10 Primary

  for preventing chemical attack · CPC title

• G01K7/02 Primary

  using thermoelectric elements, e.g. thermocouples · CPC title

• G01K7/16

  using resistive elements · CPC title

• G01K13/02

  for measuring temperature of moving fluids or granular materials capable of flow · CPC title