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
UV radiometers are used in meteorology, climatology, renewable energy research, and materials testing. They monitor the effects of UV radiation on plants, animals, and materials, and are used in environmental test chambers. UVE measurements are crucial for human biology and medical applications, including calculating the UV Index for public health.

Types of UV Radiometers
Kipp & Zonen offers a range of UV radiometers optimized for different spectral responses: UVA, UVB, and UVE. The CUV 5 model measures total UV irradiance, while the Brewer Mk III Spectrophotometer provides ultimate UV measurements. Dual-band models are available for combined 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, improving measurement accuracy. UVIATOR software automates these corrections using satellite data.

CUV 5 Broadband UV Radiometer
The CUV 5 radiometer features a glass dome for UV transmission, a shaped diffuser for directional response, and a waterproof connector. It operates without power and includes a desiccant cartridge to remain dry.

UVS Radiometers
UVS instruments are weather-protected and feature a quartz dome and diffuser for directional response. They include optical filters and a phosphor for spectral response, with temperature stabilization to maintain accuracy. Outputs are amplified for data acquisition systems.

Specifications
The document provides detailed specifications for various models, including spectral response, maximum UV irradiance, and calibration factors. It highlights the importance of temperature stabilization and the use of high-quality cables for signal transmission.