Accelerated Weathering UV Chamber

UV light, which is the most responsible for photo-degradation to materials. Accelerated Weathering UV chamber adopts fluorescent UV lamp as the light source. Its inner temperature and humidity can be properly controlled to obtain the periodic condensation on the sample for fully evaluating the damaged factor caused by sunlight, moisture and temperature (materials aging phenomenon includes fading, intensity reduction, cracking, flaking, chalking, and oxidation). Reproducible and reliable weathering data can be generated in just a few days or weeks of testing which is identical to natural outdoors which may occur over months or years. The test data can help in selection of new material, improvement of existing material to improve product durability.


Fluorescent UV light can emulate the effect of sunshine, while condensation and water spray system can emulate the effects of rain and dew. During the test, radiation energy and temperature are controllable. A typical test cycle generally carries out under strong irradiation of UV light or in the dark and wet condensation period with 100% relative humidity. These tests generally applied in the fields of paint and coatings, automotive industry, plastic, wood, glue, etc.


According to different testing requirements, we choose different wavelength UV lamps, this is because each type UV lamps produce different irradiance energy and wavelength. Generally speaking, UV lamps can be divided into UVA and UVB.

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Different types fluorescent UV lamps are used in different fields, for example:

① UVA-340 Lamp: UVA-340 Lamp can highly simulate short-wave ultraviolet light of sunlight, the wavelength range is from 365 nm to 295 nm.

② UVA 351 Lamp: Simulates UV sunlight which has passed through the windows. It is excellent for testing materials aging process indoor.

③ UVB 313 Lamp: UVB-313 lamp emits stronger shortwave ultraviolet light compared with the ultraviolet rays on Earth, thus can accelerate material aging process. However, this lamp may cause some unrealistic material damage. It is mainly used in quality control, research and development, and the test of the materials with strong weather resistance.

Complies to national and international standard:

  • ISO 16474-1 《Paints and varnishes — Methods of exposure to laboratory light sources — Part 1: General guidance》
  • ISO 16474-3 《Paints and varnishes — Methods of exposure to laboratory light sources — Part 3: Fluorescent UV lamps》
  • ISO 11507《Paints and varnished–Exposure of coatings to artificial weathering- Exposure to fluorescent UV lamps and water》
  • ISO 4892-1《 Plastics-Methods of exposure to laboratory light sources-Part 1: General Guidance》
  • ISO 4892-3《 Methods of exposure to laboratory light sources-Part 3: Fluorescent UV lamps》
  • ASTM D 4587《Standard Practice for Fluorescent UV-Condensation Exposures of Paint and Related Coatings》
  • ASTM D 4329《Standard Practice S for Fluorescent UV Exposure of Plastic》
  • ASTM G-151《Standard Practice for Exposing Nonmetallic Materials in Accelerated Test Devices that use laboratory light sources》
  • ASTM G-154《Standard Practice for Operating Fluorescent Light Apparatus for UV Exposure of Non-Metallic Materials》
  • BS 2782:Part5, 《Method 540B (Methods of Exposure to Lab Light Sources) 》
  • SAE J2020《Accelerated Exposure of Automotive Exterior Malts Using a Fluorescent UV/Condensation Apparatus》
  • JIS D 0205《Test Method of Weather-ability for Automotive Parts

Technical Specification

Model LRD-UV-260
Internal Dimension (Wx D xH) 1170 x 450x 500mm
External Dimension (W x Dx H) 1400 x 500 x 1200mm
Interior material Stainless steel SUS 304
Exterior material Powder coating on SUS 304
Temperature Range RT +10°C ~ 70°C (light cycle: 45-80°C; condesation cycle: 40-60°C)
Humidity Range 95%RH
Black Panel Temperature BPT 30°C-80°C
Controller Programmable Touch Screen Controller
Specimen size 75mm x 150mm, 13 sets on each side of lamps, total is 26 sets
Distance between lamp and specimen 50mm
UV Wavelength UVA: wavelength 340nm, UVB wavelength 313nm (life span of UV light 2000 hours)
Water spray Spraying water
Exposure Method Vapour condensation exposure, illumination irradiation exposure, and water spray

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