Hi Ryan,
I have been using 2 sensors since last Winter. They both feed into the one account. When you plug each sensor in, the auto load will open a new web-page to your account. This doesn't matter as all the information is stored in one account.
Here's a partial quote from Edith from last Winter:
[For your other questions, here’s an answer from our Plant PhD team:
“The longer you monitor a location the better (especially for soil), but one could monitor for 24 hours and feel rather good about the light and temperature readings. Very few soils are going to give a full range of moisture in less than 24 hours, which is why we recommend monitoring the plants for an entire soil moisture drawdown.
............
So you could either a) take shorter readings or b) get more sensors. Multiple sensors will work with the same user account.
Thanks-
Edith Harbaugh
Product Manager, PlantSense]