Monthly Science: Basement Safe Drying

Back in early May, I swapped in a new bag of silica gel, which (as always) immediately punched the humidity down to the Hobo datalogger’s 15%RH minimum reading:

Basement Safe - 2014-05-26
Basement Safe – 2014-05-26

A closer look at the very beginning of that data shows the humidity dropping for an hour after the door closes:

Basement Safe - 2014-05-09 Detail
Basement Safe – 2014-05-09 Detail

The logger is on the bottom of the safe, with the desiccant bag on the shelf above it, and there’s no mechanical air circulation: it’s all done by air currents, driven by whatever drives them. I have no idea what that bump in the middle means.