When I upgraded the temperature sensor on my E3Dv6 hot-end, it came with an amplifier PCB that needed to be mounted somehow in the guts of my printer. So of course - had to make a thing for that.

This will hold a PT100 amplifier PCB from http://e3d-online.com/E3D-v6/Spares/PT100-Amplifier-Board .

The mounting tab is suitable for 20mm extrusions which many printers have. Enjoy!