Introduction
The document discusses the measurement of solar ultraviolet (UV) radiation using broadband UV radiometers. UV radiation is divided into UVC (100-280 nm), UVB (280-315 nm), and UVA (315-400 nm). While UVC and most UVB are absorbed by the Earth's atmosphere, UVA reaches the surface and is significantly more prevalent than UVB. UV radiation has both beneficial and harmful effects on human health, influencing Vitamin D production and posing risks like skin cancer.

Applications
'Total UV' monitoring is crucial in meteorology and climatology, as well as in testing the UV output of light sources and solar simulators. UVA and UVB measurements are essential for studying the effects of UV radiation on living organisms and materials. UVE measurements are vital for human health applications, including calculating the UV Index for public health and developing protective cosmetics.

Choice of UV Radiometer
Kipp & Zonen offers a range of UVS broadband radiometers tailored for different UV measurement needs, including UVA, UVB, and UVE. The CUV 5 model is recommended for total UV irradiance measurement, while the Brewer Mk III Spectrophotometer is suggested for precise UV measurements.

Calibration and UVIATOR Software
UVS radiometers are calibrated against reference instruments under natural sunlight. Calibration data files allow for corrections based on solar zenith angles and ozone concentrations, enhancing measurement accuracy. The UVIATOR software automates these corrections using satellite data.

CUV 5 Broadband UV Radiometer
The CUV 5 radiometer shares features with the CMP pyranometer range and is suitable for various environments. It includes a glass dome for UV transmission, a waterproof connector, and does not require power to operate.

UVS Radiometers
UVS instruments are weather-protected and feature a detection system with optical filters and phosphor for spectral response. They are temperature-stabilized and provide amplified signal output for data acquisition systems.

Specifications
The document provides detailed specifications for various radiometer models, including spectral response, output range, and calibration factors. It also outlines the performance specifications and environmental suitability of the instruments.