Dual Band UV Radiometer Model UV-S-AE-T

Dual Band UV Radiometer
Model UV-S-AE-T

Dual band sensor to measure atmospheric UV-A and it simulates the human skin (to measure the UV-index)

UV-S Series

The UVS Radiometers form a unique set of instruments for accurate measurements of solar ultraviolet radiation in the atmosphere. The UV Radiometers have sealed, weather resistant cases made from protected aluminium. They permit continuous outdoor operation. The Radiometers can easily be adjusted in the horizontal by help of three leveling screws and the built-in circular bubble level.
The UV Radiometers are available either with thermoelectric temperature stabilization (suffix T) or with an integral electronic temperature compensation (suffix C).
While the temperature stabilization provides highest accuracy, the temperature compensation may be required when the available power is limited. In both cases, a single DC supply voltage is needed for operation.

Features

Spectral sensitivities precisely adapted to the measurement task
Very good cosine response: ±2.5 % between 0 º and 70 º zenith angle
Excellent long-term stability
Internal thermostatting at 25 ºC
Two separate analog voltage outputs for each band

Description

The UV-S-AE-T measures UV-A irradiance and Erythemal active UV irradiance.

The dual band UV-S-AE-T measures the irradiance in two spectral bands with a single sensor providing separate outputs for each band (only available as internal thermostated T-version).

The dual band UV-S-AE-T has two separate analog voltage outputs for each band. The UV-S-AE-T is only available as T-version (Internal thermostatting at 25 ºC) and have, as with the single band models, a control output for the internal temperature.

The sensor output in MED/h (Minimum Erythemal Doses per hour) can be used to predict how long the human skin can be exposed to the sun before an erythema (reddening or sunburn) occurs. Due to the Robertson-Berger type spectral response of the UV-S-AE-T radiometer, this one can be related to existing monitoring network data.

The UV-S-AE-T has a sealed, weather resistant case made from protected aluminium. The sensor permits continuous outdoor operation. The UV-S-AE-T can easily be adjusted in the horizontal by help of three leveling screws and the built-in circular bubble level.

Specification

Spectral Response	UV-A + UV-E
Sensitivity (nominal) of 1 V output corresponds to	Each output the same as single band sensors
Temperature depedence	Not Applicable
Response Time (99%)	0.5 s
Non-stability (% change / year)	max 3 %
Non-linearity (over full measurement range)	±0.05 %
Contribution at wavelengths >400 nm	<0.1 % of output
Expected accuracy for daily sums	max 5 %
Cosine response error	±2.5 % (between 0º and 70º zenith angle)