Resistive Pressure Sensor for High-temperature Applications

Ever-growing field of structural health monitoring (SHM) applications requires automatization of the structure monitoring process. Automatization of SHM processes is mainly limited by the lack of suitable sensors, such situation is especially noticeable in industrial solid-fuel boilers applications. There is huge lack of cheap and reliable sensors for internal concrete stress measurements in high-temperature. This research proposes a resistive pressure sensor prototype for measuring internal concrete stresses in a high temperature range. During the experiment sensor was integrated into concrete sample which was heated up to 600°C. During experiments sensor resistance varied from 700 kΩ to 24 Ω, obtained results proves functionality of developed sensors and its sensitivity for internal stress variation.