行业组件数据 · 2026

护套/探头

Protective sheath housing the sensing element in thermocouple temperature sensors for industrial applications.

技术定义与适配语境
典型 护套/探头 会按材料、尺寸公差、适配关系和失效风险在 机械和设备制造 中评估。

A sheath/probe assembly is the protective outer casing and sensing tip of a thermocouple temperature sensor, designed to shield the thermocouple junction from harsh environments while ensuring accurate thermal transfer. It consists of a metallic or ceramic sheath that encases the thermocouple wires and a probe tip where the temperature measurement occurs. This component provides mechanical protection, electrical insulation, and chemical resistance in industrial settings where temperature monitoring is critical.

组件规格

定义
A sheath/probe assembly is the protective outer casing and sensing tip of a thermocouple temperature sensor, designed to shield the thermocouple junction from harsh environments while ensuring accurate thermal transfer. It consists of a metallic or ceramic sheath that encases the thermocouple wires and a probe tip where the temperature measurement occurs. This component provides mechanical protection, electrical insulation, and chemical resistance in industrial settings where temperature monitoring is critical.
工作原理
The sheath/probe functions by transferring heat from the measured medium through the sheath material to the thermocouple junction inside. The sheath acts as a protective barrier while maintaining thermal conductivity to ensure the thermocouple junction reaches equilibrium with the target temperature. Different sheath materials and designs optimize response time, accuracy, and durability based on application requirements.
材料
Stainless steel (304316Inconel)ceramic (aluminamullite)nickel alloystitaniumor specialized coatings depending on temperature range and chemical exposure. Common specifications include ASTM A213 for seamless tubes or equivalent standards.
Length
50mm to 2000mm
Diameter
1.5mm to 25mm
Response Time
0.5 to 30 seconds
Pressure Rating
Up to 1000 bar
Protection Class
IP67 or higher
Temperature Range
-200°C to 1800°C
标准
ISO 9001DIN 43735IEC 60584

行业分类与别名

护套/探头 的常用贸易名称、技术标识和检索关键词。

上级产品

该组件会出现在以下整机或工业产品中。

FMEA · 风险与缓解

诱因 → 失效模式 → 工程缓解

Thermal cycling beyond material limits->Crack formation in sheath->Use materials with matching thermal expansion coefficients and implement gradual temperature changes
Chemical attack from process media->Corrosion and pitting->Select chemically resistant sheath materials and implement regular inspection schedules

工业生态与工程逻辑

0
Thermal shock damage
1
Chemical corrosion
2
Mechanical fatigue
3
Electrical leakage
4
Calibration drift

合规与检测

tolerance
±0.75% of reading or ±2.2°C, whichever is greater (for Type K thermocouples)
test method
ASTM E220 for calibration, ISO/IEC 17025 for testing laboratories

制造该组件的工厂

来自 CNFX 组件能力表的相关制造商资料。

制造商列表用于前期研究和供应商能力理解,不代表认证、排名或交易担保。

采购评估维度

不是客户评论,也不是实时热度。以下维度用于前期 RFQ 准备和供应商评估。

技术文档
4/5
制造能力
4/5
可检验性
5/5
供应商透明度
3/5

这些分值是采购评估维度示例,不代表真实客户评分、具体国家买家反馈或实时询盘。

相关组件

常见问题

What is the difference between a sheath and a probe in temperature sensors?

The sheath refers to the protective outer casing, while the probe typically includes both the sheath and the sensing tip assembly. In practice, these terms are often used interchangeably for the complete protective housing component.

How do I select the right sheath material for my application?

Consider temperature range, chemical compatibility, mechanical stress, and required response time. Stainless steel works for most applications up to 800°C, while ceramic sheaths handle higher temperatures up to 1800°C in corrosive environments.

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CNFX Industrial Component Index · 机械和设备制造

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初步技术归类
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URN:CNFX:ME:UNIT:SHEATH_PROBE