Monitoring the homogeneity of temperature fields in thermal chambers

Temperature being a non-electrical quality requires additional sensors and circuitry to measure, monitor and control. It is present in our daily life everywhere, whether we want a cozy feel in out apartment or we want to make sure that the latest ECU developed for the latest car model will work in Norway as well as in India. Thermal chambers allow us to test electronics prior to their release on the market to make sure that they meet the technical specifications we want. In a niche environment, thermal chambers are used to solder the SMD components on the PCBs, being part of reflow ovens. For desktop size reflow ovens, the temperature behavior is particularly important due to the standards we need to follow in order to ensure a repetitive and reproducible reflow profile. For this purpose, the monitor solution designed, build and tested is presented in this article.