Welcome to SOLARMETER®, the UV meter specialists. Our meters are the best value, highest quality, and most durable handheld radiometers in the photonics light measurement industry. Each Solarmeter radiometer model comes with a carrying case, instructional brochure, and 9V battery. Models 4.0 through 9.6 include a NIST traceable calibration certificate, while Model 10.0 includes a WRR traceable calibration certificate. Model 6.4 Vitamin D3 meter also includes an interactive Excel spreadsheet utility for determining appropriate UV dose level based on skin type, percent body exposure, and other factors. Visible light Models 9.4 and 9.6 enable irradiance measurements in the Blue and Red bandwidths. Global Solar Power Meter Model 10.0 enables solar panel array measure.