Similar to the first generation chamber, the MIT Generation 2 Chamber (Figure ) is designed for high-throughput characterization of perovskite films and other oxygen-sensitive materials. However, the MIT Second Generation Chamber is designed specifically to have precision control of the dew point, which facilitates performing long aging tests with very high humidity levels. The chamber is integrated with a commercial solar simulator instead of an LED lamp in order to extend illumination intensity to up to 1 Sun, and to add spectral control. These features extend the chamber's capabilities for degrading durable perovskite materials and, due to 1 Sun visible illumination source, are also more compliant under consensus stability testing conditions for perovskite solar cells . This second generation chamber is designed to cost less than US$1,500. The implementation of a commercial solar simulator for increased range and fidelity comes with an increase in chamber cost (approximately US$7,500 with the solar simulator at the time of assembly). However, this price still remains in the low range in comparison to those of commercially available degradation chambers. The chamber is illuminated with a G2V Sunbrick class AAA solar simulator with 625 cm 2 illumination area and a spectrum that is adjustable between 400-700nm. The simulator is controlled with software provided by the manufacturer. A moisture-controlled environment is attained within MIT Generation 2 Chamber through a double enclosure system where the outer enclosure is filled with water to fully submerge the inner chamber. Naturally, air within this enclosed chamber approaches its maximum saturation dew point, however, by piping dry nitrogen into the environment, the relative humidity of the air is lowered to control the dew point. Additionally, by having the chamber fully submerged in water, the temperature can be precisely controlled due to the high heat capacity of water.