Is it too much to say that I've thought that we could easily collect valuable health information by collecting data on digestion output. It mostly happens in just a few locations (unlike input), so it's perhaps worthwhile to invest in data collection.
I expect weight to be valuable, simple to collect, precise, and quantified (thus simple to analyze). Assuming excrement and urine have consistent masses, you would have good data on half of the food input/output equation, which could tell you about hydration and nutrition, the efficiency of fluid and solid digestion, etc. (Input is more difficult to measure.)
Density might also help; a sensor in the output pipe below might measure it after a consistent water pressure is applied.
For the OP, I wonder how sophisticated these instruments are. For example, using the empty bowl as baseline, you might automatically collect and quantify color data.
I expect weight to be valuable, simple to collect, precise, and quantified (thus simple to analyze). Assuming excrement and urine have consistent masses, you would have good data on half of the food input/output equation, which could tell you about hydration and nutrition, the efficiency of fluid and solid digestion, etc. (Input is more difficult to measure.)
Density might also help; a sensor in the output pipe below might measure it after a consistent water pressure is applied.
For the OP, I wonder how sophisticated these instruments are. For example, using the empty bowl as baseline, you might automatically collect and quantify color data.