6 inch long N-type thermocouple for a Fisher Scientific Isotemp Muffle Furnace

This is a specialty N-type thermocouple compatible with the small Thermo Fisher Scientific Isotemp Muffle Furnace Model 550-14 . 

It can be used instead of the original N-type thermocouple SPN103058 .

The total length is about 55 inches

The ceramic bead sensor is about 6 inch long, including the twisted tip.  (note the picture is the 8 inch version, we need to take a new picture...)

Thickness of the ceramic insulator is 6 mm

Made from 1.0 mm diameter N-type sensor wire with standard accuracy and high temperature fiberglass insulation.

This is for a specific customer, we are not sure if this will fit all Furnaces in the series. If you have information on the original probe we can match that.