Stephen Frizza May 5, 2009 what is the thing on the window which isn't a bottle? it has 4 plated panels in a globe shaped bulb and they spin around i think. i have seen these before but dont know what they are.
what is the thing on the window which isn't a bottle? it has 4 plated panels in a globe shaped bulb and they spin around i think. i have seen these before but dont know what they are.
McFortner May 5, 2009 Stephen, it's a radiometer. Since my window is a south facing, it spins a lot during the day.