Enhancing temperature measurement accuracy in thermostatic metal bath through heat conduction optimization

Daidong Chen; Kang Yang; Qiuying Lv; Ziyao Gong; Li Feng

doi:10.1117/12.3055393

12 December 2024 Enhancing temperature measurement accuracy in thermostatic metal bath through heat conduction optimization

Daidong Chen, Kang Yang, Qiuying Lv, Ziyao Gong, Li Feng

Author Affiliations +

Proceedings Volume 13439, Fourth International Conference on Testing Technology and Automation Engineering (TTAE 2024); 1343922 (2024) https://doi.org/10.1117/12.3055393
Event: Fourth International Conference on Testing Technology and Automation Engineering (TTAE 2024), 2024, Xiamen, China

Abstract

This study investigates the temperature measurement accuracy of thermostatic metal bath, aiming to improve their precision through theoretical analysis and experimental validation. Based on the heat transfer model, the effects of sensor thermal conductivity, contact area and heat transfer path on measurement accuracy were analysed. Experiments were conducted to evaluate the performance of PT100 temperature sensing elements with various materials and structures. Results indicate that measurement accuracy is closely related to the sensor’s thermal properties and structural design. The optimized sensing element, featuring a copper circular head, ultra-high thermal conductivity potting compound, and a low thermal conductivity PEEK support tube, achieved remarkably low error rates of 0.07% and 0.08% at set temperatures of 125°C and 165°C, respectively. This research provides both theoretical basis and practical guidance for enhancing the accuracy of dry thermostatic metal bath calibrators.

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Daidong Chen, Kang Yang, Qiuying Lv, Ziyao Gong, and Li Feng "Enhancing temperature measurement accuracy in thermostatic metal bath through heat conduction optimization", Proc. SPIE 13439, Fourth International Conference on Testing Technology and Automation Engineering (TTAE 2024), 1343922 (12 December 2024); https://doi.org/10.1117/12.3055393

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KEYWORDS

Temperature metrology

Calibration

Sensors

Chemical elements

Design

Thermal stability

Temperature distribution

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