摘要：This study analyzes the self-heating effect of the negative temperature coefficient thermistors in multiple thermal environments. Six thermistors were tested to explore the influence of excitation current, temperature, and mediums on the self-heating effect. The thermistors were measured at the water triple point (0.12 mK, k = 2) and the melting point of gallium (0.45 mK, k = 2) cells. Subsequently, a thermostatic bath equipped with a heat pipe was used to calibrate the thermistors and measure their self-heating effect within ?5 °C–35 °C. The calibration uncertainty was estimated to be 0.60 mK (k = 2). The self-heating effect of thermistors increases with higher current and decreases with rising temperature. The temperature difference between currents of 0.01 mA and 0.05 mA was approximately 50 mK at the water triple point and 15 mK at the gallium fixed-point. Self-heating in the thermostatic bath was about one-third of that in fixed points. Computational fluid dynamics simulation results corroborated these findings, aligning well with experimental measurements. To ensure accurate measurements, it is crucial to maintain consistent conditions and medium when calibrating and using the thermistors. ? 2024

ISSN号：1290-0729

卷、期、页：卷210

发表日期：2025-04-01

期刊分区（SCI为中科院分区）：二区

收录情况：SCI（科学引文索引印刷版）,EI（工程索引）,SCIE（科学引文索引网络版）

发表期刊名称：International Journal of Thermal Sciences

参与作者：孙建平,李婷,王光耀,冯飞飞,杜兰,单巍,孙立权

通讯作者：李嘉豪

第一作者：李岩

论文类型：期刊论文

论文概要：李嘉豪,孙建平,李岩,李婷,王光耀,冯飞飞,杜兰,单巍,孙立权，Analysis of NTC thermistors self-heating effect in multiple thermal environments，International Journal of Thermal Sciences，2025，卷210

论文题目：Analysis of NTC thermistors self-heating effect in multiple thermal environments