Hi Paul,
The temp sensors that I am using are these: Thermocouple Amplifier MAX31855 breakout board (MAX6675 upgrade) : ID 269 : $14.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Out of the two temp sensors, one of them is measuring the temp on an electronic component that can have a temp change of 25 to 100 degrees C in 100 milliseconds. So quite fast. And I need to read these two sensors (in addition to two analog sensors and one digital) every milliseconds and send the values via serial to computer for data logging and analysis.
On the PC the data are being graphed in real time using SimPlot (also the data are being stored as text files).
Thanks