Selecting the proper physical actinometer
, such as a radiometer, to measure light is not trivial either.
The fraction of light energy absorbed by the reaction mixture was determined with a ferrioxalate actinometer
For example, the Kipp & Zonen Linke-Feussner actinometer
has an aperture of 10.
Table 1 compares average CAD-predicted fluence rates in the experimental chamber with measurement-based estimates of fluence rate using three sensing devices: (1) a fiat sensor, (2) a cylindrical sensor, and (3) a chemical actinometer
In Estonia routine broadband direct solar radiation measurements with the Yanishevsky thermoelectric actinometer
started at Tartu-Toravere Meteorological Station (58.
Its photoreactivity was first discovered in 1833 and it was later suggested as a chemical actinometer
for light intensity measurements.
Apparently due to a wider than traditional field of view (FOV = 10[degrees]) of the Toravere actinometer
AT50, values of the broadband direct beam in our database are slightly overestimated in cases of larger aerosol turbidity.
Total solar radiation has been measured at Tartu-Toravere meteorological station consistently since 1955, mainly with the Yanishevski AT-50 actinometers
and Savinov-Yanishevski M-115 pyranometers.
Until 1996 the Yanishevski AT-50 actinometers
were used, being then replaced by the Eppley Labor.