I have updated the web page on the accuracy of aneroid barometers with my daily data from December 2016.  Data was tabulated for 20 different aneroid barometers.  The aneroid barometer readings were compared daily with simultaneos readings from my mercury barometer.  All instruments were set to measure local pressure, not sea level pressure, so that the sea level correction does not influence the results.  The average error and standard deviation of the errors were calculated for each aneroid barometer.  The average error can be reduced somewhat by recalibration of the barometer, but the standard deviation of the errors is a more intrinsic indicator of barometer performance.  The results are sorted in a table from lowest standard deviation to highest standard deviation, and may be found at 'Barometer Calculations/Accuracy of Aneroid Barometers'.

Happy New Year!

Go to Accuracy of Aneroid Barometer webpage.