PROSorb - Product information and prices

PROSorb directions

PROSorb is a 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.

Which silica gel is best for which humidity range?


Graph 2 - click to zoom
Table: Adsorption capacity at 25°C:

  PROSorb ART SORB Silica gel E = microporous
Silica gel M = macroporous
Relative humidity Water adsorption in weight % Between
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%  

Further advantages of PROSorb

Further technical data

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 and sachets:

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 cassettes

Dimensions: 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

PROSorb half-size cassettes

Dimensions: 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

PROSorb sachets, dust-proof

Made of LDPE film 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.

PROSorb-Sheets

Thickness: 10 or 20 mm. Dimensions up to 600 x 1150 mm, conditioning 35 - 60% RH. Sheets are only produced on order.

Material. PP-honeycomb, lined on one side by a polyester non-woven, on one side by Marvelseal 360
The 10 mm sheets contain ~ 3,5 kg PRO SORB / m². Total weight ~ 5 - 5,5 kg / m² depending on conditioning.
The 20 mm sheets contain ~ 7,5 kg PRO SORB / m². Total weight ~ 10,5 - 12 kg / m² depending on conditioning.


Honeycomb sheets and their polyester lining have been Oddy-tested in 2011 and are safe for permanent use in museum showcases. The aluminum film Marvelseal is being heat-sealed without addition of any further products. The Marvelseal film is bent around the edges and covers ~ 10 mm of the front side as well. The outer 10 mm of the sheets don't contain any PRO SORB - they can be used to to fix the sheets to a wall etc. The edges are re-inforced with Oddy-tested aluminum tape 3M #425

Conditioning, weight and year of production are indicated on the back side of each sheet. We deliver the sheets sealed in aluminum film.

Round sheets or any other shapes are possible upon request. Just send us your drawing and ask for a quote.

The sheets are not completely dust proof. So don't use them above works of art!



For a larger picture please click

PROSorb beads and cassettes can be ordered, with no additional charge, conditioned to the following RHs:  35%, 40%, 45% 50%, 55%, or 60% RH (please indicate along with your order). Conditioning refers to 20°C, with a tolerance of ±2% RH.

Prices:
For PRO SORB sales to USA and Canada please contact our distributor www.keepsafe.ca

PROSorb beads

Sealed in aluminum bags.
From 8 kg packed in metal containers

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
Order

PROSorb full-size cassettes

Dimensions: 335 x 110 x 44 mm; content: 950 g beads; PP/polyester, non woven

Please indicate the desired conditioning: 35%, 40%, 45% 50%, 55% or 60% RH

1 cassette 48.- € / cass.
from 4 cassettes 45.- € / cass.
from 8 cassettes 44.- € / cass.
from 20 cassettes 43.- € / cass.
Order

PROSorb half-size cassettes

Dimensions: 335 x 110 x 24 mm; content: 500 g beads; PP/polyester, non woven

Please indicate the desired conditioning: 35%, 40%, 45% 50%, 55% or 60% RH

1 cassette 29.- € / cass.
from 4 cassettes 28.- € / cass.
from 8 cassettes 27.- € / cass.
from 24 cassettes 26.- € / cass.
Order


PROSorb sachets

Everything made to your requirements:

  • dimensions (up to 35 x 35 cm)
  • content, gross weight and conditioning stamped on top side, so you can use them like cassettes
  • conditioning (35% 40%, 45%, 50%, 55% or 60% RH)

Material: bottom LDPE, top TYVEK 1073, (non-woven PE, dustproof, sturdy, vapour-permeable), sealed in aluminum bags.

Price per sachet:

Standard size: 35 x 15 cm, good for up to 500 g of PRO SORB:
€ 1.50 + price for the content.

All other sizes independent of dimensions, content and conditioning:
€ 4,50 + price for the content.


Special designs possible: e.g. straps for hanging, etc. (price upon request)

Order

PROSorb-Sheets

Sheets 10 mm or 20 cm

Please indicate size, thickness and conditioning: 35%, 40%, 45%, 50%, 55% or 60% RH.

Price for custom made sheets depends on square meters and cirumference

Rectangular sheets in 10 mm thickness:

Price = € 320,- x surface in m² + € 25,- x circumferance in m (circumference = 2 x length + 2 x width).
Example: a sheet 60 x 40 x 1 cm would cost: 76,80 + € 50,- = € 126,80

Rectangular sheets in 10 mm thickness:

Price = € 440,- x surface in m² + € 30,- x circumferance in m.

Special requests like cut-outs, non-woven on boths sides etc: please ask for a quotation.

Order

Re-conditioning

We re-condition your used PROSorb cassettes, bags and pearls to your desired relative humidity.

per pc. or kg 5.- €
Order

Terms of sales and delivery

Products in stock are usually sent out within one week. Nevertheless, please order as early as possible. Transport is normally by FedEx Economy (±2-3 days within Europe), carriage is charged according to weight, dimensions and number of parcels.
All prices exclude VAT. Payments can be made within 30 days by bank transfer, within 14 days with 3% discount. All prices are subject to change without prior notice according to our terms and conditions. Check our website for actual information. For PRO SORB sales to USA and Canada please contact our distributor www.keepsafe.ca

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