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热敏电阻

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单击下图中的某一器件

热敏电阻是一种半导体,其电阻比导电材料大,但比绝缘材料低。热敏电阻的温度与其电阻之间的关系很大程度上取决于其制成材料,称为温度系数。它由电阻已知的两种材料制成:具有负温度系数(NTC)的材料和具有正温度系数(PTC)的材料。NTC热敏电阻的电阻随温度升高而降低,而PTC热敏电阻的电阻随温度升高而增加。NTC热敏电阻常用于小型温度测量装置,如手持式设备和楼宇采暖控制。

热敏电阻提供各种基极电阻以及电阻与温度关系曲线。对于低温应用(–55°C至约+70°C),通常使用2 kΩ至10 kΩ范围内的较低电阻。较高温度应用通常使用高于10 kΩ的高电阻热敏电阻。标称电阻值通常指25°C下的阻值,温度系数为Ω/°C数值。在指定温度范围内其精度约为±0.2°C,热敏电阻持久耐用,价格低廉。

Using Custom Thermistors with the Temp-to-Bits Family

定制热敏电阻搭配 Temp-to-Bits 系列产品使用

本文重点介绍定制热敏电阻以及配置转换器的两种方式。

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This Should Work: Thermistor Senses Liquid Levels

用途:热敏电阻检测液位

在使用热敏电阻、RTD 或其他电阻温度传感器的精密温度测量应用中,必须注意避免由于传感器励磁电流的自体加热效应导致的误差。

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