Gigahertz-Optik’s BTS2048-UV is a compact sized spectroradiometer for absolute UV measurement in the lab, factory or field. BTS stands for Bi-Technology Sensor which combines the properties of a photodiode with those of a CCD array. Through bilateral correction of both sensors’ measurements accurate results over a wide dynamic range are realized. The BiTec Sensor allows the measurement of irradiance, spectral irradiance, radiant intensity, spectral radiant intensity, radiant power and intensity with integrating sphere option. The BTS2048-UV 2048 pixel CCD array has a useable spectral responsivity range between 190 nm and 430 nm with a 0.7 nm optical bandwidth and a pixel resolution of 0.13nm/pixel. Due to its back-thinned technology, this CCD chip is substantially more sensitive as compared to conventional front-illuminated CCD chips. Furthermore the CCD is one stage cooled (1TEC). Ultrafast response times are achieved using three processors, a LAN interface and electronic shutter. An internally controlled filter wheel combined with smart stray light correction and measurement routines enable high quality absolute UV measurements down to 200nm. A unique feature is its cosine diffuser input optic (f2 ≤ 3 %). No light guide means improved sensitivity and calibration stability. Also the BTS2048-UV mechanically mounts directly to Gigahertz-Optik integrating sphere port frames without a light guide as well. The BTS2048-UV is traceably calibrated and certified to international NMI standards. S-BTS2048 user software supplied with the BTS2048-UV spectroradiometer offers a flexible desktop that can be individually configured to display all graphical and numerical data taken or only those measurement parameters of interest. An SDK option is also available. Complementary products for use with the BTS2048-UV include integrating spheres, radiant intensity attachments, goniometers and custom designed components suited for a particular industrial, medical or research application.