Product Announcement from Solar Light Company, Inc.
Model 540 MICROTOPS II® is a 5 channel hand-held sunphotometer for measuring aerosol optical thickness easily, accurately and dependably. Direct solar radiation at 5 discrete wavelengths is measured and stored. MICROTOPS II® features an accuracy comparable to much larger and more expensive instruments. Optional GPS receiver facilitates field operation. Choose five of eight available WMO wavelength filters or specify up to five custom wavelengths. The Microtops II® Sunphotometer provides the aerosol optical thickness at each of the 8 possible standard wavelengths 340, 380, 440, 500, 675, 870, 936, and 1020nm. Choose up to 5. It also measures direct solar irradiance at all chosen wavelengths and water vapor column with 936 and either one or both 870 &1020 nm.