Today I updated and expanded the web page on the accuracy of my digital barometers.  I compared daily simultaneous local pressure values from the digital barometers with values from my mercury barometer for the month of December 2016.  Values of the pressure error, the standard deviation of the pressure error, and the monthly average drift are presented.  

This may be found at 'Barometric Calculations/Accuracy of Digital Barometers'.

Go to 'Accuracy of Digital Barometers'