A direct pyranometer is a pyranometer that measures the solar radiation intensity on a surface perpendicular to a predetermined direction, including the sun's photosphere at its center.
■Features
・A method that uses a newly developed ultra-high-speed thermopile in the light receiving section to detect direct solar radiation from the temperature difference between hot and cold junctions.
- A quartz window with a wide transmission wavelength range and a low power consumption (12V 0.5W) thin film heater to prevent condensation ensure stable, high-precision direct solar radiation measurement at all times.
・The incidence cylinder surrounding the sensing part complies with WMO (World Meteorological Organization) recommendations, and is mounted on the solar tracking device so that it always faces the sun.
- The sun tracking device automatically switches to sun sensor tracking mode on clear days and to mechanical tracking mode on cloudy days.
・The lightweight and compact body design exhibits stable performance even with changes in ambient temperature, and by installing it in the STR-21G/22G solar tracking device equipped with GPS, it is easier to use and provides more accurate direct tracking. Enables solar radiation measurement.
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