
| PROSorb is a new silica gel
ideally suited for stabilizing relative
humidity inside museum display cases and storage cabinets. The ideal level of humidity for most museum display cases and storage cabinets is a level between 40 - 60% RH (Relative Humidity). It is also desirable to maintain this level for as long as possible. PROSorb has a unique and exceptional adsorption capacity within the 40 - 60% RH range (see graph to the right), and surpasses all other products sold for this purpose. PROSorb is able to maintain a stable RH within narrow margins through its ability to both absorb and desorb water vapour; and is provided pre-conditioned to your desired humidity level PROSorb also has a longer life span than other silica gels. |
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Which silica gel is best for which humidity range?
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![]() Graph 2 - click to zoom |
| PROSorb | ART SORB | Silica gel E = microporous |
Silica gel M = macroporous | |||||
| Relative humidity | Water adsorption in weight % | Bbetween 40% - 60% RH |
Water adsorption in weight % | Between 40% - 60% RH |
Water adsorption in weight % | Between 40% - 60% RH |
Water adsorption in weight % | Between 40% - 60% RH |
| 10% RH | 6.2% | 6.5% | 7% | 2% | ||||
| 20% RH | 10.6% | 11.5% | 14% | 3% | ||||
| 30% RH | 16.2% | 16% | 20.5% | 4% | ||||
| 40% RH | 22.5 % | 16,3% | 22% | 13% | 25% | 5,5% | 5% | 3% |
| 50% RH | 30.4% | 26% | 28.5% | 6.5% | ||||
| 60% RH | 38.8% | 35% | 30.5% | 8% | ||||
| 70% RH | 44.9% | 54% | 32% | 11% | ||||
| 80% RH | 46.8 % | 67% | 33% | 17% | ||||
| 90% RH | 48 % | 74% | 34% | 32.5% | ||||
| 100% RH | 49 % | 80% | 35% | 93% | ||||
| Bulk density | ca. 0.7 kg/l |
| Pore volume | ca. 0.5 ml/g |
| Breaking strength | over 200 N |
| Internal surface area | ca. 750 m2/g |
PROSorb cassettes are easier to handle than beads. They don’t need trays or containers and are quickly exchanged quickly. Re-conditioning their RH-value can be done easily by weight within the first 1 - 2 years. After a longer period of time, due to the slow degradation shown by all types of silica gel, conditioning must be checked with a calibrated hygrometer. The cassettes consist of sturdy PP and vapour-permeable non-woven polyester. They are filled with PROSorb beads.
PROSorb full-size cassettesDimensions: L 335 mm, W 110 mm, H 44 mm. Content: 950 g beads. One or more cassettes per cubic metre of air volume are required, depending on circumstances of application (see: PROSorb directions) |
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PROSorb half-size cassettesDimensions: L 335 mm, W 110 mm, H 24 mm. Content: 500 g beads. One or more cassettes per 0.7 cubic metre of air volume are required, depending on circumstances of application (see: PROSorb directions) |
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PROSorb sachets, dust-proofMade of PE and TYVEK 1073, (non-woven PE, dustproof, sturdy, vapour-permeable).Everything made to your requirements: dimensions (up to 35 x 35 cm), content in grams, conditioning. The sachets are stamped with content, conditioning and weight, so you can use them like cassettes. |
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PROSorb beadsSealed in aluminium bags. Please indicate the desired conditioning: 35%, 40%, 45% 50%, 55% or 60% RH |
1 kg | 43.- € / kg |
| from 5 kg | 40.- € / kg | |
| from 10 kg | 39.- € / kg | |
| from 20 kg | 38.- € / kg | |
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PROSorb full-size cassettesDimensions: 335 x 110 x 44 mm; content: 950 g beads; PP/polyester, non woven |
1 cassette | 48.- € / cass. |
| from 4 cassettes | 45.- € / cass. | |
| from 8 cassettes | 44.- € / cass. | |
| from 24 cassettes | 43.- € / cass. | |
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PROSorb half-size cassettesDimensions: 335 x 110 x 24 mm; content: 500 g beads; PP/polyester, non woven |
1 cassette | 29.- € / cass. |
| from 4 cassettes | 28.- € / cass. | |
| from 8 cassettes | 27.- € / cass. | |
| from 24 cassettes | 26.- € / cass. | |
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PROSorb sachetsEverything made to your requirements:
Material: bottom LDPE, top TYVEK 1073, (non-woven PE, dustproof, sturdy, vapour-permeable), sealed in aluminium bags. |
Price per sachet: Standard size: 35 x 15 cm, good for up to 500 g of PRO SORB: All other sizes independent of dimensions, content and conditioning: |
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