6. 1. Outer dome
2. Inner dome
3. Black carbon disk to absorbs a
broad range of wavelengths
4. Second, control disk acts as a
comparison and compensating
element
5. Thermopile temperature
sensor compares the
temperature rise of the two
disks
6. Output lead
7. Replaceable silica gel cartridge
to absorbs moisture
8. Adjustable screw legs
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Pyranometer