Finnish publication Betoni (translates to Concrete) published an article related to the science behind HumiSense, that predicts the drying of concrete structures. A research project was conducted at a worksite in Espoo in 2020, which confirmed the thesis that the humidity inside concrete can be calculated and even predicted based on information on the structure type and the concrete mix, when ambient conditions in the worksite are also known.
The article is available (in Finnish, with an English summary): https://betoni.com/betonilehti/2-2021/