solarimeter

[ soh-luh-rim-i-ter ]
/ ˌsoʊ ləˈrɪm ɪ tər /

noun

an instrument for measuring solar radiation.

British Dictionary definitions for solarimeter

solarimeter
/ (ˌsəʊləˈrɪmɪtə) /

noun

any of various instruments for measuring solar radiation, as by use of a bolometer or thermopile Also called: pyranometer