Comments about P3 P3 E9300 Professional Weather Station:
Together with extra temperature/humidity sensors this makes a reasonably priced data collection package to establish and monitor the heat loss/gain performance of a house. Also one can monitor the humidity levels in an attic and root cellar.
It was relatively easy to set up, though it took several tries to get it to find all of the external sensors error free. It seemed to find some other non-existent sensors.
One feature it would be great to have would be a Bluetooth link for daily or weekly data dumping.