What we are saying is, to control an atmosphere you need to control the exposure of that atmosphere to further moisture, so close down the flow of air in to the space and remove any condensation and damp in the atmosphere from the now controlled environment and these Dampstick’s do just that. and they do it quite quickly, but the amount of The Dampstick’s you need to use will depend on the moisture content of the atmosphere (dampness of the air when you close the doors ) and just as importantly, how much moisture your stored items hold, also the quantity of items IE the cubic capacity they take up, and the frequency you open up that atmosphere and if you replenish it with damp air again.
What is The Dampstick, the principal is not new your granny used something similar in her biscuit tin lids and you have seen those little packets in New camera cases and handbags, well it’s something like that but much bigger. They are often used in cargo carrying Shipping Containers, especially when hanging garments are being shipped ( a 40’ Shipping Container coming into the UK can have 24 tons of clothing hanging on rails from the Far East).
Other companies do manufacture something similar, they can be cheaper or more expensive, and they all say they are the best, but we believe ‘The Dampstick ‘poles are not only the most effective, but economical and safest to use. It’s basically a plastic tube, trapezoidal in shape for strength, 750(L) x 115(W0 x833(D) with a compartment at the top which holds 1000grm of Anhydrous Calcium Chloride. (Often a percentage of clay is used by other manufacturers to bulk up the Calcium Chloride we do not use any bulking substitutes.)
How Does The Dampstick Work…
Simply by opening the plastic bag covering the enclosed The Dampstick you start the absorption process working. You then hang it up in a strategic position out of the way. You may not notice anything different for a while, as the crystals will need to absorb the moisture, but depending how much moisture The Dampstick is coping with, you will start to notice some water collecting on the inside of the tube at the bottom. This is The Dampstick sump, and when it fills up it will be heavy, it can hold ? litres of water so make sure it is hung securely to a point that can take that weight which is 2.2 Kilo Grams, 4.8 lbs ( or approx 2.5 x 2lb bags of sugar )! It will keep working taking the moisture out of the atmosphere and holding it in its sump, preventing it being returned back into the atmosphere, it will continue until the crystals are exhausted and have been diluted in the water in the sump.
If you find the sump is full after a very short time, then you have too much moisture and you need more The Dampstick, but under normal conditions and regular domestic storage items they should last at least between 3 and 6 months.
Your own good housekeeping and management is the key to good storage. Now have a look at Our menu of specific enclosed areas that can be affected by condensation and damp with tips and recommendations on how to control them.
This absorption pole was designed and developed for two distinct markets namely:
- International Container Transport of cargoes susceptible to moisture damage.
- Domestic Static Storage.
Although the dynamics of these markets are different the technical aspects are actually very similar in that the basic criterion is to reduce the Relative Humidity (amount of compound moisture in the air) in an enclosed space to a level which protects the contents from both direct moisture damage, damp and mould growth. In a Shipping Container direct moisture damage is the main issue and results from the formation of condensation and damp on a cold steel surface sometimes referred to as ‘container rain’. In Leisure applications such as caravan, boating and beach huts, it is damp and mould.
There are other marketed absorption poles that use a wide variety of compound mixes to cope with different applications and more importantly time frames. The average cargo only spends 6 weeks inside a container and therefore the requirement for lengthier operation is far less than a domestic storage container or a leisure unit. The basic aim of The Dampstick was to produce a product which was technically superior, safer and gave wider and much longer operational benefits to a variety of applications. To appreciate the qualities of The Dampstick pole the mechanism and chemical nature of desiccant must be recognised.
The basic desiccant is calcium chloride which is a very powerful absorber of moisture to such an extent that every single pure CaCl2 molecule wants to absorb 6 water molecules. On achieving this it turns into a liquid which surprisingly will then continue to absorb even more moisture until it is fully saturated- depending on conditions the original CaCl2 can absorb more than 150% of its starting weight.
The Dampstick pole takes total advantage of this in its design but other similar looking manufactured products often exhibit defects.
Many similar products use a *Di-hydrate CaCl2 as the starting material which means 1/3 of its initial capacity is already used and once an additional 4 molecules have been absorbed the liquid runs directly into the bottom chamber with no time to absorb further moisture.
The Dampstick pole uses a pure totally **Anhydrous CaCl2 starting material and has an uniquely designed internal structure which keeps the liquid in the top part of the pole for a significantly longer length of time during which it absorbs an additional amount of moisture.
Hence from a visual comparison point of view you will see liquid in the bottom chamber of other similar products much sooner than in The Dampstick pole. In terms of numbers, The Dampstick pole will absorb around 200g more grammes of moisture than most other similar products before any liquid exists and then it will remain in the top section continuing to absorb for several days. This means that in a Direct Laboratory Controlled comparison to other similar products it could easily be 4 weeks longer before you see liquid in the bottom chamber of The Dampstick pole. This does not mean that it is not working!
Recent data shows that the top part of the pole can hold over 500g of liquid before any liquid becomes visible in the bottom section. Once liquid starts to appear then the process will be continual.
In an operational environment when the pole has been absorbing for a few weeks The Dampstick pole will be noticeably fatter and heavier in the upper encasement. This demonstrates that it is working!
Also it should be recognised that as the relative humidity in the atmosphere of the enclosed area is reduced the speed of absorption declines. The Dampstick pole adapts to this change much better than other similar products and therefore does not waste its capacity.
* A chemical compound containing two molecules of water.
** A total absence of water.