Performance Evaluation of K-Type Thermocouple-Based Temperature Measurement Using ESP32

Abstract

This paper describes the experimental testing of a temperature measurement system that uses a K-type thermocouple and an ESP32 microcontroller. The experimental setup was designed to measure temperatures ranging from 25°C to 600°C, with a laboratory furnace serving as the heat source. The K-type thermocouple was connected to the ESP32 via a MAX6675 converter, which translates thermocouple signals into digital data. The temperature readings were then displayed on the ESP32 Serial Monitor. To assess the accuracy of the system, the temperature values recorded by the ESP32-based system were compared to those from a standard reference meter at various temperature points. The collected data were examined to evaluate how closely the measurements from the system matched the reference values. The findings indicate that the readings from the ESP32-based system closely align with those from the standard meter across the tested temperature range. This comparison confirms that the integration of a K-type thermocouple with the ESP32 provides consistent and dependable temperature readings. The developed system serves as an affordable option for laboratory temperature monitoring and has potential for expansion into real-time monitoring, data recording, and IoT-enabled high-temperature measurement applications.