行业组件数据 · 2026

电位器/可变电阻器

Variable resistor component for fuel level sensing in automotive applications

技术定义与适配语境
典型 电位器/可变电阻器 会按材料、尺寸公差、适配关系和失效风险在 汽车制造 中评估。

A potentiometer or variable resistor is an electromechanical component used in fuel level sensors to convert the mechanical position of a float arm into a variable electrical resistance, providing continuous analog measurement of fuel volume in automotive fuel tanks.

组件规格

定义
A potentiometer or variable resistor is an electromechanical component used in fuel level sensors to convert the mechanical position of a float arm into a variable electrical resistance, providing continuous analog measurement of fuel volume in automotive fuel tanks.
工作原理
Operates on the principle of variable resistance through a sliding contact (wiper) moving along a resistive track. As the float arm moves with fuel level changes, the wiper position changes, altering the resistance between terminals proportionally to fuel volume.
材料
Resistive element: Carbon filmcermetor conductive plasticWiper: Phosphor bronze or beryllium copperHousing: Thermoplastic (PBTPPS) or metalTerminals: Brass or copper alloy with tin plating
IP Rating
IP67 for fuel immersion applications
Linearity
±3% to ±10%
Tolerance
±10% to ±20%
Power Rating
0.25W to 0.5W
Mechanical Life
50,000 to 100,000 cycles
Resistance Range
100Ω to 10kΩ
Operating Temperature
-40°C to +125°C
标准
ISO 16380DIN 43760SAE J1930

行业分类与别名

电位器/可变电阻器 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

Abrasive wear of resistive track->Increased resistance variation, nonlinear output->Use conductive plastic tracks with lubricants, implement protective coatings, regular calibration
Fuel additive contamination->Corrosion of wiper contact, increased contact resistance->Select corrosion-resistant materials (beryllium copper), implement sealed housing design
Mechanical binding of float arm->Stuck sensor reading, inaccurate fuel level indication->Precision bearing design, regular maintenance, debris protection

工业生态与工程逻辑

0
Resistive track wear over time
1
Fuel contamination affecting electrical contact
2
Mechanical binding of float mechanism
3
Temperature-induced resistance drift

合规与检测

tolerance
Resistance tolerance ±10%, linearity tolerance ±5% for automotive applications
test method
ISO 16380 for automotive fuel level sensors, including immersion testing, temperature cycling, and vibration resistance testing

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

How does a potentiometer work in a fuel level sensor?

The potentiometer converts mechanical float arm movement into variable electrical resistance. As fuel level changes, the float moves, changing the wiper position on the resistive track, which alters the output resistance proportionally to fuel volume.

What are common failure modes of fuel level potentiometers?

Common failures include resistive track wear, wiper contact degradation, mechanical binding of float arm, and contamination from fuel additives causing increased resistance or open circuits.

Can potentiometer-based fuel sensors be used with ethanol-blended fuels?

Yes, but materials must be compatible. Special resistive tracks and wiper materials resistant to ethanol corrosion are required, along with sealed housings to prevent fuel ingress affecting electrical performance.

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CNFX Industrial Component Index · 汽车制造

数据基础

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初步技术归类
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请求制造能力信息: 电位器/可变电阻器

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