A Radiometer measures electromagnetic radiation. The vanes inside rotate when exposed to sunlight, artificial light or even the heat of a hand nearby (not touching the glass). 

Solar Radiometer

£19.99Price

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    Seasplang Beauty is a brand of Artesan Crafts, 3 Rossie Sq. Montrose, Scotland DD10 9RW   jacqueline@artesancrafts.com

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