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  6. [Technical Documentation] Techniques for Temperature Measurement Using Thermocouples and Heat Flow Sensors

[Technical Documentation] Techniques for Temperature Measurement Using Thermocouples and Heat Flow Sensors

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last updated:Sep 24, 2025

トヨタ自動車 エナジーソリューション事業部
トヨタ自動車 エナジーソリューション事業部
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The idea of designing heat based on heat flow rather than temperature. Towards the development of an efficient thermal management system with heat flow sensors!

Are you aware that the temperature measured can deviate from reality depending on how the thermocouple is installed? This is a challenge that troubles many engineers dealing with heat. In thermal design of circuits, accurately understanding heat generation and dissipation is a technical trend. A heat flow sensor that can measure thermal energy with high precision can solve this issue. This technical document explains the challenges of thermocouple measurement and the advantages of heat flow sensors. [Examples of recommended fields] - Heat dissipation from engine surfaces - Thermal balance, heat loss, and thermal efficiency of heat exchangers and heat pumps - Evaluation of cooling capacity - Understanding the heat generation of each component in circuit thermal design

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熱電対取り付けによる計測誤差.jpg

[Technical Documentation] Techniques for Temperature Measurement Using Thermocouples and Heat Flow Sensors

熱電対取り付けによる計測誤差.jpg
熱電対取り付けによる計測誤差.jpg 電力計測に代わる発熱量の計測.jpg 熱流センサによる発熱量計測.jpg
  • Detailed information about Toyota's thermal flow sensor "Energy flow" can be found here.
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*This document is provided by Denso Corporation. [Other published content (partial)] ■Heat Generation Measurement Section - Challenges in heat generation measurement - Differences between thermocouples and heat flow sensors - Features of heat flow sensor Energy flow - Benefits of heat flow sensors and case studies (e.g., contributions to the automotive field) *For more details, please download the PDF or feel free to contact us.

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[Technical Information] Semiconductor Thermal Flow Sensor "Energy Flow" Achieving Ultra-High Precision Measurement and the Basics of Traditional Thermocouple Measurement

[Technical Information] Semiconductor Thermal Flow Sensor "Energy Flow" Achieving Ultra-High Precision Measurement and the Basics of Traditional Thermocouple Measurement

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トヨタ自動車

トヨタ自動車 エナジーソリューション事業部

Energy

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In the business development area of Toyota Motor Corporation, we are developing technology solution businesses that leverage the technologies and know-how cultivated over many years of car manufacturing. The heat flow sensor "Energy flow," which can measure "heat flux" essential for elucidating the mechanisms of temperature changes with high sensitivity and simplicity, is an in-house sensor utilized in Toyota's vehicle development field. It has become an indispensable item for the development of high-efficiency thermal energy management systems/components aimed at a decarbonized society, and it is being used by customers in various industries, including the automotive sector. Please feel free to contact us when you need assistance.

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