Pyrheliometer definitions

pīr'hē-lē-ŏm'ĭ-tər, pĭr'-
Any of various devices that measure the intensity of solar radiation received at the earth.
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An instrument for measuring the amount of energy given off by the sun.
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An instrument used to measure the total amount of radiation from the Sun that hits a surface. It works by converting the Sun's heat into a voltage that is then recorded by a voltmeter.
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