Environmental Controls and Security

PROSorb

PROSorb is a new silica gel ideally suited to stabilize 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 desirable to maintain an appropriate RH level for as long as possible. PROSorb has a unique and exceptional adsorption capacity within the 40 - 60 % RH range (see graphs below), 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 shipped pre-conditioned to your desired humidity level.

PROSorb also has a longer life span than other silica gels.

PROSorb Beads and Cassettes:

PROSorb is available as loose beads as well as in rigid plastic cassettes. Cassettes are open to the air on one side only, and are designed to be laid flat for use. They are easier to handle than beads: they don't need trays or containers and may be easily exchanged. Re-conditioning the RH-value of a cassette can be done easily by weight. Cassettes are constructed of sturdy polypropylene and vapour permeable non-woven polyester fabric and are filled with PROSorb beads.

Full-size Cassettes: dimensions:  L 335 mm / 13.2 ", W 110 mm / 4.3", H 44 mm / 1.75".  Content: beads. One or more cassettes per cubic metre of air volume / 30 cubic feet are required depending on circumstances of application, especially case leakage.

Half-size cassettes: dimensions:  L 335 mm / 13.2 ", W 110 mm / 4.3", H 24 mm / 1".  Content: beads. One half-size cassette will be sufficient for 0,7 m3 / 20 cubic feet, depending on circumstances of application.

Technical data:

Bulk density: 0.7 kg/l

Pore volume: 0.5 ml/g

Breaking strength: > 200 N

Internal surface area: 750 m2 /g

(Please specify “Desired Humidity Level", i.e. 40%, 45%, 50%, 55% or 60% RH, in comments section on billing page at check out when ordering.