George, I recommend checking with ambientweather.com. They have all different price ranges. I believe that most attach them to their ladder with the supplied bracket. I have a Davis Vantage Vue at home that I love, but expensive for an RV.
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Ron and Terrie Ames - MOC #1920/KF0NTA
2021Montana 3230CK Super Solar Legacy Package
2021 Ram 3500 Laramie Longhorn, BIM Charging
4x4, SRW, LB, Crew Cab, Pullrite 3900 Hitch
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