UV Sensor

The UV Sensor measures the sunburning portion of the UV spectrum.

Its spectral response matches very closely the Erythema Action Spectrum (EAS),defined by McKinlay and Diffey (1987) and adopted by the Commission Internationale de l’Eclairage (C.I.E.) as the standard representation of the human skin’s sensitivity to UV radiation. The sensor measures global solar UV irradiance, the sum of the components of solar UV transmitted directly and those scattered in the atmosphere. Scattered UV is a major portion of global irradiance.

The transducer is a semiconductor photodiode that responds only to radiation in the region of interest. The diffuser provides an excellent cosine response. With multiple hard-oxide coatings, the interference filter provides the Erythema Action spectral response. It is stable in the presence of heat and humidity. The outer shell shields the sensor from thermal radiation and provides a path for convection cooling of the body, minimizing heating of the sensor interior. It provides a cutoff ring for cosine response, a level indicator, and fins to aid in aligning the sensor with the sun’s rays. Spring-loaded mounting screws, in conjunction with the level indicator, enable rapid and accurate levelling of the sensor. Each sensor is calibrated against a Yankee Environmental Systems’ Ultraviolet Pyranometer, model UVB-1, in natural summer daylight.

The UV Sensor is optional on Vantage Pro2 weather stations. It is standard on the Vantage Pro2 Plus. Please refer to the WeatherLink® for Vantage Pro® and Vantage Pro2™ specification sheet for optional data logging and charting capabilities available for this product.

The transducer is a semiconductor photodiode that responds only to radiation in the region of interest. The diffuser provides an excellent cosine response. With multiple hard-oxide coatings, the interference filter provides the Erythema Action spectral response. It is stable in the presence of heat and humidity. The outer shell shields the sensor from thermal radiation and provides a path for convection cooling of the body, minimizing heating of the sensor interior. It provides a cutoff ring for cosine response, a level indicator, and fins to aid in aligning the sensor with the sun’s rays. Spring-loaded mounting screws, in conjunction with the level indicator, enable rapid and accurate levelling of the sensor. Each sensor is calibrated against a secondary standard that is calibrated periodically against a Yankee Environmental Systems’ Ultraviolet Pyranometer, model UVB-1, in natural daylight.

The UV Sensor is optional on Vantage Pro weather stations. It is standard on the Vantage Pro Plus. Please refer to the WeatherLink for Vantage Pro Spec Sheet for optional data logging and charting capabilities available for this product.

SPECIFICATIONS