The Trianglelab Thermistor Cartridge PT1000 for E3D hotend v6 heater block supports upto 450 degrees.

PT1000 sensors are able to measure higher temperatures than your typical thermistors – up to 400C and are moreaccurate too.These are perfect if you are printing high temperature materials. usually these can be a direct replacement for your another thermistorwithout having to add a PT100 stick.The included resistors can be used to modify your MCU for higher accuracy, consult the documentation from your controller’s manufacturer.
Handy information:Operating temperature range 0-450degreesMetal cartridge dimension 3MM diameter 15MM length1 meter length fiberglass High temperature resistant wireRESISTANCE VALUE CHART PER 1C PT1000:http://www.hayashidenko.co.jp/en/info14.htmlWhat do you get?1 x PT1000 seneor with sealed with metal cartridge3 x 1K 0.1% SMD Resistors 0603 package1 x 2P 2.54MM Terminal wire