Visit the official NILU-UV website at

NILU-UV Unique Features:

SOFTWARE providing the user with:
- CIE weighted dose rates
- Total ozone abundance
- Integrated UVA and UVB irradiances
- Integrated PAR irradiance
- Estimates of cloud and surface albedo effects

BUILT-IN DATA LOGGER implying that:
- Remote data retrieval is possible via modem and public telephone lines
- No PC is required for operation

Instrument Development and User Experiences
Since the early seventies the Norwegian Institute for Air Research (NILU) has been engaged in developing methods and instruments for environmental observation and monitoring. One outcome of this is the UV Irradiance Meter, NILU-UV, an accurate, reliable, and robust filter instrument for measuring irradiances at ultraviolet (UV) wavelengths. The NILU-UV instrument has been thoroughly tested through comparisons with well calibrated spectral radiometers over extended time periods with significant variations in ozone and cloud cover. Pilot versions of the NILU-UV have been deployed at remote sites in South Chile for continuous, unattended measurements of UV radiation. Eight NILU-UVs were deployed there at altitudes up to 1200 m in a climate with cold, snowy, and windy winters. Under such severe climatic conditions the pilot versions of the NILU-UV proved to be robust and reliable. Its rugged construction is designed to withstand the rigors of transport and installation at remote sites. Another NILU-UV is deployed in Tibet at an altitude of 3600 m, where it has been performing flawlessly. In addition to deployments in South-America and Tibet, NILU-UVs are currently used for UV measurements in Europe and USA.

References for the UV Irradiance Meter:

Høiskar, B.A.K, R. Haugen, T. Danielsen, A. Kylling, K. Edvardsen, A. Dahlback, B. Johnsen, M. Blumthaler and J. Schreder (2003) "A new multichannel moderate bandwidth filter instrument for the measurement of the total ozone column amount, cloud transmittance and UV dose rates." Applied Optics, 42, 3472-3479.

A. Dahlback (1996) "Measurements of biologically effective UV-doses, total ozone abudance and cloud effects with multi-channel moderate bandwidth filter instruments", Applied Optics, 35, 6514-6521.

K.Stamnes (1988), S-C. Tsay, W.J. Wiscombe, and K. Jayaweera. "Numerically stable algorithm for dicrete-ordinate method radiative transfer in multiple scattering and emitting layered media". Applied Optics, 27, 2502-2509.