I learned some days ago how #moisture gets trapped inside #sealed enclosures used for #electronics when exposed to daily cycles of heat and cold.
The cold creates lower pressure inside. If that overpowers the seals, then outside air gets sucked in, carrying moisture. This extra moisture can condense inside and accumulate at the bottom.
In the next warm part of the cycle, if some air is expelled because of the higher pressure, that moisture is not carried out because it is in a liquid state.🧵
Repeat this a lot of times, and you will get the electronic circuit diving inside the enclosure 😂
I want to measure how the humidity and pressure fluctuate inside an enclosure that I'm prototyping for an industrial composting temperature sensor, so I assembled a quick hack with an Adafruit ESP32 Feather V2 running SensorWatcher that will report that every 10 minutes. The sensors are an HTU31D for humidity and a BMP388 for pressure.🧵