UV Accelerated Weathering Testing with Controlled Light and Moisture Cycles
The DERUI UV accelerated weathering tester exposes specimens to fluorescent UV radiation, elevated temperature, condensation and—where specified—water spray. It helps laboratories compare how plastics, coatings, rubber, textiles and other nonmetallic materials respond to controlled accelerated weathering conditions.
Programmable cycles and irradiance control support repeatable material screening, formulation comparison and quality-control work. The equipment can be configured around the specimen format and the exposure method required by your material or customer specification.
What the Tester Reproduces—and What the Results Mean
Fluorescent UV weathering equipment concentrates on the short-wave UV, heat and moisture stresses that drive many outdoor degradation mechanisms. Depending on the material and evaluation method, laboratories can track color change, gloss loss, chalking, cracking, embrittlement, strength loss or other defined property changes.
Controlled exposure
- Fluorescent UV radiation at a defined irradiance
- Black-panel or chamber temperature control
- Condensation to reproduce prolonged surface wetness
- Water spray when required by the selected procedure
- Repeatable programmed transitions between cycle steps
Useful decisions
- Compare formulations, coatings or suppliers
- Screen materials before longer outdoor exposure
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cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits.
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| Parameter | cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits | cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits |
|---|---|---|
| cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits | cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits | cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits |
| cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits | cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits | cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits |
| cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits | 25°C bis 70°C | 25°C bis 80°C |
| cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits | 0.35–0.70 W/m²/nm | 0.35–0.70 W/m²/nm |
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| Controller | cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits | cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits |
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| Stromversorgung | cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits | cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits |
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| Method | Typical scope | cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits |
|---|---|---|
| ASTM G154 | cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits | cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits |
| ISO 4892-3 | cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits | cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits |
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| ASTM D4329 | cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits | Product specification, cycle and post-exposure measurements |
| ASTM D4587 | Fluorescent UV-condensation exposure of paint and related coatings | Cycle, specimen preparation and coating failure criteria |
| cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits | Accelerated exposure of automotive exterior materials using fluorescent UV and condensation apparatus | Automotive program requirements and reporting conditions |
For a detailed explanation of the basic practice, read DERUI’s ASTM UV resistance testing guide. If full-spectrum sunlight simulation is required, compare the application with a xenon arc weathering test chamber rather than assuming the two light sources are interchangeable.
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- Define the methodIdentify the material standard, end-use environment, control specimen and properties to be measured.
- Select the lamp and cycleConfirm fluorescent UV lamp type, irradiance, exposure temperature, condensation or spray stage and total duration.
- Prepare specimensCondition, label and mount samples consistently; record initial color, gloss, mass, strength or other baseline properties.
- Program and verifyEnter the approved sequence and verify sensors, water supply, irradiance calibration and alarm settings before exposure.
- Monitor the runDocument interruptions, lamp changes, water conditions and any deviation from the approved procedure.
- Evaluate consistentlyCondition exposed specimens as required, compare them with controls and report results using the specified measurement method.
Materials and Applications
Coatings and paints
Compare gloss retention, color change, chalking, cracking, blistering and adhesion after a defined fluorescent UV and moisture exposure.
Plastics and polymers
Screen resin formulations, stabilizers and pigments for discoloration, embrittlement, surface cracking and mechanical-property change.
Automotive materials
Evaluate exterior polymer parts, coatings, seals, trim and selected interior materials under the applicable OEM or industry procedure.
Rubber and sealants
Investigate surface cracking, hardness change and loss of elasticity caused by combined UV, heat and moisture stresses.
Textiles and outdoor products
Assess color retention and material degradation where the chosen textile or product specification permits fluorescent UV exposure.
Research and quality control
Compare new formulations with an approved control and monitor production consistency without claiming a universal outdoor-life conversion.
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DERUI provides a one-year whole-machine warranty, lifetime technical consultation, remote video guidance and operator training. Overseas installation can be arranged as a separately quoted service, and spare-parts support is available for up to ten years.
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What is the difference between UVA-340 and UVB-313 lamps?
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What should be included in an RFQ?
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Request a UV Weathering Tester Configuration
Send your material, specimen size, applicable method, lamp requirement and exposure cycle. DERUI will review the test profile and recommend the chamber, specimen holders, control functions and laboratory utilities required for the program.
- Standard and customized configurations
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