Introduction |
There is an large range of MSR portable water filtration devices http://cascadedesigns.com/msr/ available for consumers. They have chemical, non-chemical and electrical based water filtration/purification devices.
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Filtration Methods |
MSR products use one, or a combination of the following; ceramic, carbon, hollow fibre, labyrinth with carbon, Silica depth plus sodium hypochlorite, and salt with electrical current. Most of their products filter down to 0.2 microns. |
Ease of Use |
All the MSR products provide instructions on use and maintenance. They are required as there are many components to replace once the unit stops filtering. To actually retrieve water, there are many steps to obtain clean water from the MSR range of products. Taking time to assemble, time to use, time to dismantle, time to pack away. With the multi-part system of the MSR, there could be potential for breakage and loss of parts needed to filter water. |
Speed to Access of Water |
There is a lengthy time to obtain water from all the MSR products. The longest being 4 hours (MIOX range, electrical powered device) to take out Giardia and Cryptosporidium. The others take a minimum of a couple of minutes and that amount to then pack it away. |
Chemical Based Filters/Purifiers |
As quoted by the US Army Centre for Health (2006) http://www.dtic.mil/cgi-bin/GetTRDoc?AD=ADA453960&Location=U2&doc=GetTRDoc.pdf regarding to iodine resins, “…resins are not effective for inactivating or removing Cryptosporidium oocysts….Giardia cysts appear to be more resistant to inactivation by iodine resins..”. These oocysts and cysts are a major cause for water related illness. |
Reliability and State of Mind |
Both the MSR and AquaSafeStraw have past extensive testing to verify their specification when the product is in prime condition. Both the AquaSafeStraw and MSR products stop working once the filter is congested. |
Cost per gallon/liter |
The cost of MSR range start form $79US and up to $139US. That’s at least 12.7 cents per litre or 48 cents per gallon! Compared to 7 cents a litre or 26.5 cents per gallon for the AquaSafeStraw. |
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Portability |
AquaSafeStraw is light weight (24g), 21cm long unit, 1.8cm diameter. The product can fit in your pocket. |
Longevity |
Most of the MSR range filters/purifies in excess of 700 litres/182 gallons compared to AquaSafeStraw 500 litre/132g (minimum recommended levels of water intake are 2 litres/3 pints of water per day. Lasting approx 250 days of average consumption). |
Bacteria and Virus Removal Properties |
MSR products removes bacteria and in MIOX also viruses. The MSR (except the MIOX Water purifier) removes everything larger than 0.2 micron. The AquaSafeStraw filters out all Bacteria as well as Cryptosporidium and Giardia above to 0.2 microns exceeding the America’s Centre of Disease Control and prevention (www.cdc.gov) recommendation of filters to a minimum of 1 micron. The |
How can AquaSafeStraw be so cost effective and be an effective water filtration system? |
How does AquaSafeStraw be technologically advanced and be so price competitive? |
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Product Characteristics |
MSR Sweetwater Purifier |
AquaSafeStraw |
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Price (RRP) |
$ 89 US |
$44.95 US |
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Capacity Volume of water |
750 Litres/ |
500 litres / |
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Filtration levels |
0.2 micron |
0.2 micron |
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Volume cost of water |
12.7 cents/litre |
7 cents/litre |
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Exceeds CDC recommendations |
No |
Yes |
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Approved by relevant authorities |
Yes |
Yes |
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Chemicals |
Yes |
No |
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Satisfies US Army recommendation for water filtration |
Yes |
Yes |
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Ease of Use |
Medium |
Very Easy |
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Reputable manufacturing standards |
Yes |
Yes |
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Longevity |
Yes |
Yes |
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Stop working once filtration stops working |
Yes |
Yes |
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Portability/size |
19 cm long x 5 cm in diameter |
21 cm long x 1.8 cm diameter |