The sample holder (Figure ) is made of graphite to conduct heat efficiently and is painted with matte, neutral gray paint to avoid interfering with sample photography. Pins are used for mounting the samples accurately on the sample holder, and the surfaces are tilted to reduce specular reflectance of the perovskite film samples. The sample degradation during the aging test is monitored via a ThorLabs DCC1645C CMOS camera that is attached to the lamp dome (Figure ). The camera was ordered from the manufacturer with the infrared filter removed, in order to expand the spectrum of the camera. The camera is controlled with a LabVIEW program (shared in the code repository) in which the main camera settings can be adjusted according to the illumination conditions and the frequency of taking pictures is set. Additional electric contacts can be added to the sample holder for expanded in-situ characterization but are opted out in this chamber version. This is because a minimum design producing data for machine learning -aided high throughput aging testing was desired, i.e., the priorities were simple, expandability and data with machine-readable quality with minimal interventions.