Hi folks,
Apologies if this has been addressed previously.
I would really like to see dew point on emoncms from my emonTH. At the moment I’m fiddling with a process to approximate it from temperature and relative humidity, but it’s a bit of a pig. I’m using
$T_d = T - \frac{100 - H}{5}$
which is an approximation, allegedly valid above 50% humidity.
Have I implemented it correctly?
https://screenshots.firefox.com/bnt8fYXXdf4Ce34t/localhost
Dew point is much more useful to me as a measure of the absolute water content of the air, and should stay the same as the temperature varies. This is intuitively true: heating up the air doesn’t change the amount of water in it. It’s much harder to gauge how much moisture is in the air by looking at relative humidity.
Is there a better way for me to record dew point?
Bruce