One simple method to determine the metastability limit at a constant temperature, which can be below the boiling point of the solvent, involves driving supersaturation through the evaporation of solvent with a gas purge of the reactor headspace. Unlike the previous examples involving distillation, real-time feedback was not necessary to perform the evaporative crystallization of acetaminophen, as data extraction could be completed at the experiment's completion. However, the nucleation of solids within the solution, deposition of residue on flask walls, and changing reactor volume all pose a challenging test case for HeinSight2.0 with multiple changing visual elements, as shown in Figure .