Solar Light Company, Inc.'s Model 521 MICROTOPS II® is a compact, handheld 5 channel hand-held ozonometer for measuring total ozone column easily, accurately and dependably. It measures direct solar ultraviolet radiation at 3 discrete wavelengths within the UVB range, as well as total water vapor and aerosol optical thickness (AOT) using the 936 and 1020 nanometer channels. This meter features very high accuracy, comparable to much larger and more expensive instruments. We also offer a GPS receiver optionally to facilitate field operation.

Typical applications include: weather stations, scientific and educational studies, pollution monitoring, photobiology, environmental monitoring, ozonometry, and environmental monitoring.

Solar Light Company, Inc. has been recognized worldwide for over 50 years as America's premier manufacturer of precision ultraviolet light sources, solar simulators, and radiometers. Our standard line of UV, visible, and IR radiometers and light meters measure laboratory, industrial, environmental, and health related light levels with NIST traceable accuracy. Column ozone, aerosol, and water vapor thickness measurements, in addition to long-term global ultraviolet radiation studies all over the world are performed using our atmospheric line of instrumentation. Solar Light also provides NIST traceable spectroradiometric analyses, calibrations for light meters and light sources, accelerated ultraviolet radiation degradation testing of materials, and OEM instrumentation and monitors. Please visit http://solarlight.com/ for more details, specifications, and pictures!