# Open Questions

This is here to just raise some questions, which are not really necessary, but help to not forget "silly ideas" and to push brainstorming.

1. Should the meassurement system inside the CEM relative or absolute. Should it everybox be 100% x 100%. This would mean you move inside the box to position 10% 20% not 100cm 100cm or so. What is the measurment system inside CEM, especially if there are different sizes of CEM.

2. Are the pH plus and minus, and the A/B liquids coming to the CEM inside the tray.