__NOTOC__ [[Image:Filterpen NORIT.jpg|thumb|right|150px200px|Filterpen NORIT]] __NOTOC__ <small-title />
The FilterPen is a handy water filter in the form of a straw which filters the water by means of X-Flow micro filtration membranes. The membranes have an average pore diameter of 0,18 micrometers and a maximum pore diameter of 0,25 micrometers. It therefore removes mainly bacteria and protozoa. Viruses are not removed because they are smaller than the pores. If there are indications that the water to be purified is contaminated with viruses or if there are doubts about this, prior treatment should be given to the water before using FilterPen.
===Suitable conditions==={{procontable | proborder="1" cellpadding="5" cellspacing="0" align="center"|-! width="50%" style="background:#efefef;" | Advantages! style="background:#f0f8ff;" | Disadvantages|-| valign="top" |- High quality assurance, since each FilterPen is tested individually for its effectiveness. <br>
- Fail safe system: filter will block when seriously fouled.<br>
| convalign= "top" | - Low capacity which concerns short lifespan<br>
- Not suitable for long term use <br>
- Not suitable for turbid water <br>
- High cost <br>
}|}
==History and social context==
==Suitable conditions ==
The flow rate is 0,5 L/min at 0,1 bar. It is suitable for purification of about 100 litres of water, depending on the quality of the water to be purified and whether the instructions for maintenance and cleaning are followed.
===Construction, operations and maintenance===
[[Image:Filterpen NORIT diagram.jpg|thumb|right|200px|Cross section of a Filterpen]]
==Technical specification==
====Operation====
[[Image:Filterpen NORIT diagram.jpg|thumb|right|150px|Cross section of a Filterpen]]
The FilterPen weighs just 30 grams. The length is 200 mm with a diameter of 16,20 mm. The FIlterPen is used like a straw.
Before storing the FilterPen for a longer period of time, first clean it. Cleaning tablets and pipette are also supplied to clean the membranes. A complete set of instructions on how it should be done is provided with the product.
====Treatment Efficiency====
====Maintenance====
The filterpen Quite sensitive to shocks, so avoid dropping or collisions. However, as far as proper maintenance is conducted, no real damage should occur.
====Manufacturing====
No possibility for local manufacturing. Filterpens are manufactured by NORIT Filtrix B.V. They are tested by KIWA water research using Pseudomonas Diminuta and VItens using E.coli
====Estimated Lifespan====
====Suppliers====
* Free mold designs are available from CAWST * [http://www.livingwatersway.com/inc/sdetail/livingwaters__norit_filter_pen/304/468 LivingWaters™ Norit Filter Pen]
==Cost=Costs===
{{Treatment_Cost2
|CapCost= [2] US$ 64 = €45,7 <br>[3] £ 13,50 = US$ 21,97 = €15,7
}}
[2] http://www.alibaba.com/product-
free/215990355/abalone_paua_kyanite_BEAD_necklace.html
[3] http://www.gear-zone.co.uk/eshop/Careplus-Filtrix-Water-Filter-Pen.html
==Country experiences==
==Manuals==
==Movies==
==Footnotes==
==Acknowledgements==
==References=Manuals, videos and links===* [http://www.alibaba.com/product-free/215990355/abalone_paua_kyanite_BEAD_necklace.html Abalone paua kyanite BEAD necklace].
{{Joinus}}* [http://www.livingwatersway.com/inc/sdetail/livingwaters__norit_filter_pen/438/469 Water Purification]. Pens and other small, portable methods.