Grundfos pumps are well known in the solar and hydronic community. We use them in our solar water heating and radiant floor heating kits. If you need help with sizing pumps and piping systems, let us know.
IMC Solar Controllers control the solar water heating system to maximize efficiency. They incorporate a digital readout showing the temperatures of the solar collector and the storage tank. There are two optional sensors to monitor return temperature or outside temperatures. The controller logs temperature data and can be connected to a computer.
Sensors for most applications. Remote temperature readouts are handy.