ProDriPole, which uses anhydrous calcium chloride, is designed to work in relatively open environments as opposed to silica gel and activated clay which must be contained within a controlled atmosphere such as a hermetically-sealed barrier foil bag in order to be effective.
The anhydrous calcium chloride is contained within the top section of the pole and the liquid that is generated during the absorption process is collected in the bottom sump section of the pole. This unique design allows the absorptive qualities of the anhydrous calcium chloride to be maximised whilst ensuring that the liquid is maintained in a sealed unit.
Generally four to six poles are required for a 20ft container and six to twelve poles for 40ft containers but the number will vary according to the length of transit, prevailing conditions and the type of cargo. The design and size of the pole allows it to hang securely in the natural recesses of the container.