Accelerated weathering lets you see years of sun, rain, and humidity in weeks-if your test method and instrument match the failure you care about. Two cornerstone practices guide that choice:
- ASTM G154 - fluorescent UV lamp exposure for non-metallic materials
- ASTM G155 - xenon arc exposure to simulate full-spectrum sunlight (direct or through glass)
Below, we break down what each practice means in real testing, and how LIB's UV Weathering Test Chamber and LIB's Xenon Weathering Test Chamber map cleanly to those requirements.
The Standards ASTM G154 and ASTM G155 at a Glance
ASTM G154 is a practice for operating fluorescent UV weathering devices. Because it's a practice (not a pass/fail method), results must always be reported with the exact operating conditions-lamp type, irradiance setpoint, black panel temperature, wet/dry cycle, etc. In short: it defines how to run fluorescent UV devices, not whether your material "passes."
ASTM G155 is the parallel practice for xenon arc apparatus. Xenon sources reproduce the solar spectrum (UV + visible + IR), with optional moisture via spray or humidity, making G155 the go-to when you need the closest laboratory proxy to natural sunlight-either outdoor daylight or behind-glass exposure (via filters). As with G154, G155 focuses on operating and control conditions rather than a universal "result."
Rule of thumb:
- Choose G154 (fluorescent UV) when UV-driven degradation is primary and you want simple, fast, repeatable cycling.
- Choose G155 (xenon) when color/appearance, photo-oxidation, or full-spectrum realism matters (outdoor or through-glass).
LIB UV Weathering Test Chamber - Built for ASTM G154
If your program calls for ASTM G154, LIB's UV Weathering Test Chamber aligns with the practice and everyday lab needs:
|
Feature |
Specification |
|
Light source |
8 × fluorescent UV lamps (40 W each), UVA-340 & UVB-313 options, lamp life ≥ 5,000 h |
|
Spectral band |
290–400 nm with irradiance control 0.3–20 W/m² via built-in sensor |
|
Temperature & moisture |
Chamber temp up to 90 °C, black panel 35–80 °C; ≥95% RH with programmable spray for wet/dry cycling |
|
Capacity & handling |
Up to 56 specimens with flat aluminum holders for consistent exposure |
|
Usability |
Touchscreen controller with Ethernet/PC link, per-lamp current display, door interlock; SUS304 stainless liner |
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|
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LIB Xenon Weathering Test Chamber - Built for ASTM G155
When your stakeholders expect realistic sunlight exposure-color/appearance retention, behind-glass performance, or cross-material comparisons-the LIB Xenon Weathering Test Chamber is your G155 workhorse:
|
Feature |
Specification |
|
Light source |
4,500 W water-cooled xenon arc lamp with closed-loop irradiance control; bands at 340 nm, 420 nm, or 300–400 nm monitored by internal radiometer (±5%) |
|
Irradiance range |
35–150 W/m² to cover common G155 and application-specific setpoints |
|
Temperature & humidity |
Chamber ambient to 100 °C (±2 °C); black panel 35–85 °C; 50–98% RH |
|
Moisture |
Fully programmable spray for rainfall events and stepwise cycles |
|
Specimen handling |
Rotating holder, ~42 specimens, robust water system (auto supply & purification) for long continuous runs |
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Why Laboratories Pick LIB for Weathering
- Spec accuracy you can prove. Closed-loop irradiance with on-board sensors and optional bands at 340 nm/420 nm/300–400 nm on xenon; 0.3–20 W/m² control on fluorescent UV.
- Stable long runs. Water-cooled xenon at 4,500 W, automatic water supply/purification, corrosion-resistant plumbing, and stainless interiors keep multi-week tests on track.
- Operator-friendly. Rotating holders, high specimen capacity, Ethernet/USB data links, safety interlocks, and per-lamp diagnostics reduce human error and downtime.
- Customized to your method. Chamber size, holder design, filters/bands, and controller functions can be tailored to your standard or internal spec.
- After-sales you can rely on. LIB provides 3-year warranty and lifetime service for peace of mind throughout the equipment lifecycle.
Ready to Design Your Weathering Program?
Whether you're building a fast screening workflow under ASTM G154 or validating real-world performance under ASTM G155, LIB's UV and Xenon Weathering Test Chambers give you the controls and stability to generate confident data-backed by a 3-year warranty and lifetime service.
Tell LIB your testing requirements and time-to-decision. We'll help you configure the chamber, lamps/filters, and exposure cycle that gets you to answers faster-without sacrificing relevance.
