It is a 3950, 100k ohm type thermistor (http://www.ebay.com/itm/271890531456), not sure why I didn’t just buy it from you. It looks like from the config it is set as the right type to load the right temp tables.
My multi-meter is acting weird and isn’t correctly reading resistance on the thermistor (or the spare one I have from the heat bed you linked to in your new 3d printer design or just any random resistor I have). I will pickup a new one tomorrow and verify that.
Thank you for such an incredible project. Have really had a lot of fun with this and appreciate all of the time you have put into this project!