Coal detector

Blueprint Requirements
1,000,000x steel, 10,000x coal

Improves all coal mines of a corporation in the region it is installed in to produce 12x coal instead of 8x.

The u version makes it produce 16x coal, and the uu version produces 80x coal. It is 5x more powerful to have a uu version versus u version. If you will produce coal for coal power plants, then rushing a uu is a must!