Bandol Wheel - Senze-Instruments

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Process & Quality Control

Bandol Wheel

Coatings & Industry > Corrosion + Ageing > Accelerated Weathering Test
BANDOL WHEEL ®   532

BANDOL WHEEL® 532 is a reliable accelerated weathering instrument in a compact design for acceleration of natural weathering.

BANDOL WHEEL® 532/I – designed for dry weathering cycles, was developed for quick but natural weathering, similar to outdoor exposure. To complete the weathering cycle, a mask can be added in the equipment which permits the introduction of obscurity phases without switching off the light source. The samples get a nominal UV radiation level corresponding to about “2 suns”. This permits an important acceleration in weathering that, at the same time, still correlates with natural weathering.

BANDOL WHEEL® H 532/II – designed for wet or dry weathering cycles, was developed for quick but natural weathering, similar to outdoor exposure. To complete the weathering cycle, a mask can be added in the equipment which permits the introduction of obscurity phases without switching off the light source. The samples get a nominal UV radiation level corresponding to about “2 suns”. This permits an important acceleration in weathering that, at the same time, still correlates with natural weathering.

Standards  
  • PrEN 16472
  • NF T 51-195-5                
  • ISO 4892-1

with exceptionally large exposition surface
Design and Function
BANDOL WHEEL® 532/I – designed for "Dry" weathering cycles, was developed for quick but natural weathering, similar to outdoor exposure.
BANDOL WHEEL ® H 532/II is the „Wet“ version and is based on the classical version of the equipment in which an immersion phase of the samples has been added.
To achieve this, a tank has been installed in the lower part of the test chamber. The regulation of the solution’s level in this tank allows to adjust the proportion between „Wet and Dry“ cycles from a very precise, sure and reproducible way.
To complete the weathering cycle, a mask can be added in the equipment which permits the introduction of obscurity phases without switching off the light source (increase of the lamp lifetime).





Sun vs Bandol Wheel

The average temperature homogeneity and radiation over each exposed sample are ensured by the rotation of the rack around the horizontal axis.
This leads to optimal test reproducibility and reliability.
An advantage is the exceptionally large exposition surface (more than 100 samples of 1 cm width) in relation to its size.
The BANDOL WHEEL® System,   together  with the regulation of the temperature by a micro-controller, allows to obtain results that classical instrument can not achieve.
A mean pressure mercury lamp, whose bulb is enclosed in a borosilicate shell, has  selected as the light source. The main advantages are: excellent efficiency of UV radiation (3 times more than Xenon lamps); negligible emission of UV C; balance UV A- UV B similar to the global radiation on the Earth surface; long lifetime and a very weak altering of the spectrum during the lifetime of the lamp.

The samples get a nominal UV radiation level corresponding to about “2 suns”. This permits an important acceleration in weathering that, at the same time, still correlates with natural weathering.


Technical Data

Dimensions (WxHxD) approx.  590 x 470 x 410 mm
Weight, net  532/I      approx. 30 kg
                  532/II     approx. 32 kg
Power supply             230 VAC, 50/60 Hz, single phase, 10 A fuse
Power consumption     max. 500 W
Solution consumption (532/II)  approx. 2 l/day
Light source               400 W air cooled mercury discharge lamp
Temperature              55 °C - 80 °C
                     532/II  45 °C - 80 °C
Exposure area             up to 1272 cm2
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