cmroseberry,
Quote:
Originally Posted by cmroseberry
After pulling my hair out for years trying to get rid of noise on thermocouple signals, I now favor RTD's and temperature sensing integrated circuits such the Analog Devices AD-592. These transducers are inherently less susceptible to noise.
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You are quite right about the noise in the thermocouples. I was able to deal with this in post-processing. I wrote a macro in Excel that would average over several readings. This smoothed things out quite a bit.
Also available is 1-wire sensors. They are accurate, and can be easily interfaced to an Arduino. In fact, 1-wire interface code is included in the Arduino development system.
-AC_Hacker