Hello! Never thought the day would come where I would ask this. But as I have had problem to get FG down to where I want it lately I thought it would be interesting to hear how you get a reliable result? I have done about 65 all grain batches by now and thought I would had nailed it by now, but nope! Through my wife who work at a lab I had borrowed a calibrated highly accurate thermometer (0.00 precision). Its digital and read the temperature immediately. When I dip it in various places and depth in the pot it can differ up to 5C at a bad day. It does level out after stirring the pot around for a while and left to rest for about 10 min, but even then it can vary a bit. Do you trust your reading and how do you do? (My last Munich Dunkel came into FG 1.016 instead of 1.011.. and i dont know why. High FG has been a problem lately. Rant start here: What i have found is that it is really difficult determine the accuracy of the measurement of thermometers in beer brewing! I would not reliably be able to tell the differentiated closer than 1.5C at the most based on an average in the pot. If there is interest I can try to record the variation next time and make it to a web friendly gif or something.