sensor

Hello everybody, I have to buy a tablet for a research project. During the project I have to collect sensor and user inputs of the tablet (The goal is to predict the attention level of the user with machine learning). I'm thinking about the following sensors / specifications the tablet should...

The auto rotate stopped working so I had to get an app so I can manually rotate the screen on my tablet. Did the G sensor die? I just have like a month with the tablet. I know it is an old model but I have an older model and still rotates on its own. This model has 16 GB of space, the other...