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Very stable temperature control

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HendriXML:
I started this post with not much (formal) knowledge of PID control systems.

In the meantime I found some good video's giving more insight into PID control.
https://youtu.be/NVLXCwc8HzM

mzzj:
Look for INA330 peltier controller if you want stability.. noise level below 0.0001C

Thermistor is the way to go if you want maximum sensitivity but don't care about long-term stability.
Platinum resistance thermometers(Pt100)  or SPRT's have less sensitivity but better long-term stability.

LaserSteve:
See if you can get a copy of A microcontroller-based driver to stabilize the temperature of an optical stage to within 1 mK in the range , using a Peltier heat pump and a thermistor sensor
A W Sloman, Paul Buggs, James Molloy and Douglas Stewart     Measurement Science and Technology,  Volume 7,  Number 11

Bill Sloman hangs out on sci.electronics.design  (google groups) and is the principal author.  He might just send you a copy.

Steve

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