for our obs weather control we use AAG which produces the right data for automation programmes. This gives wind speed, rain sensing, IR reading of sky (cloud readings), humidity and ambient temperature. Generally the cheapest reliable weather control on the market. There are other cheaper ones but I don't know of anyone using these. The AAG with anemometer cost $700 and we also got a solo to go with it which cost another $400 or so dollars. It's not a cheap exercise but I don't want our gear or clients gear getting damaged, so the expense is a necessity.
We also have a Holman weather station which uploads to a phone programme and that gives use more data on weather, rain fall, dew point, humidity, barometric pressure etc. That cost $400 but it cannot do anything for an observatory control system.
