mrburnette:
A common thermocouple amplifier is: Thermocouple Amplifier MAX31855 breakout board (MAX6675 upgrade) : ID 269 : $14.95 : Adafruit Industries, Unique & fun DIY electronics and kitsMy experience with thermistors indicates around +/- 2C can be obtained rather reliably... with precision 1% components, +/- 1C can be managed. My most recent wireless thermometer: ESP8266 Wireless Temperature
great, I was just about to order some MX6675 until your post....
The MAX6675 has been discontinued by Maxim
MAX31855K seems to be the chip of the day
as for the 'accuracy' of a thermocouple. getting a number to decimal places is resolution, having it return to the exact same output with the exact same input is repeatability, then there is hysteresys....
I accept that you can be 2 deg off, but have great sensitivity and repeatability. What did you find as regards these things ?
if your sensitivity and repeatability are great, then you can just shift the reading in software.
Dave