I just wanted to mention. Make sure you use "Convert Thermocouple Reading.vi", which is located in:
Function palette -> Data Aqcuisition -> Signal Conditioning
This vi is sometimes overlooked. It can simplify a lot your project.
Other than that, look at the following page:
http://www.ni.com/sensors/
Everything about sensors.
Best regards;
Vargas
www.vartortech.com