PT100's are  high temperature, high accuracy temperature sensors that make a great upgrade to your E3D or similar hot end.  

This kit provides all that you need to convert you E3D hot end over to PT100 temperature measurement.  The PT100 provides accuracy up to 400C.  These sensors are also very easy to handle, being of a metal cartridge construction that is secured with a set screw, no more fiberglass sleeving or clamping washer.

If you want experiment with printing the crazy high temperature materials, get more accurate temperature readings, and have a much more robust and easy to assemble temperature sensor then a PT100 is an ideal option.

This is a kit that provides everything you need to get up and running with a PT100 sensor on most machines. Requires a controller board that is running Marlin or Repetier with a spare analog input pin.

This kit contains a PT100 sensor, a heater block that is compatible with that sensor, an electrical amplifier board to connect the PT100 to your printer controller board, and the required screws for holding everything together. This kit is compatible with all E3D HotEnds except for Cyclops.

This upgrade is also compatible with the Hexagon hot end.