This method measures optical and mechanical changes induced by precisely simulated weather events.

UL TTC’s controlled irradiance (CI) Xenon arc apparatus guarantees constant light intensities as well as exact temperature and humidity control. All our tests are thus carried out with the necessary reliability with regard to correlativity, precision, reproducibility and repeatability.

Artificial light aging/weathering in the Xenon-WOM (Weather-Ometer®) Artificial light aging/weathering in the Xenon-WOM (Weather-Ometer®)

Compared to natural tests, this method significantly reduces the time required to calculate the light aging/weathering stability of test specimens. All important climatic facto


Radiation source Possible indicator properties
Xenon arc lamps, water-cooled Optical and/or
mechanical measurements


Any standard geometries are suitable. Specimens with other dimensions can be tested subject to agreement.