SteriPEN Emergency by Hydro-Photon Review

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Short review:
No method of water treatment is perfect for every situation but for people who will be drinking relatively clean and colorless municipal, well, spring, or bottled water that merely requires disinfection to render microorganisms harmless, the SteriPEN is ideal.
Long Review:
The Emergency is the basic SteriPEN model with a red color scheme. All of the SteriPENs have the same basic mechanism with differences being in form, weight, type of battery, and expected battery life. Some of the models also have LCD readouts. They are sold in different colors and with or without batteries, a storage pouch, filters, etc. The primary difference is between the heavier ones that use four AA batteries and the ones that use two CR123 batteries. The Emergency uses AA batteries and fits tightly into water bottles for inversion and agitation.
The SteriPEN website provides charts that compare some of the models to each other, a very extensive FAQ, and user manuals. It is well worth spending some time there before choosing a particular model.
Ultraviolet or UV radiation is invisible but the lamp on the SteriPEN also emits energy in the visible spectrum which appears as bluish light. UV must penetrate the water and reach the microorganism and then go through the cell membrane and body to disrupt the DNA molecules and prevent reproduction. UV does not remove the microorganisms or any particulate matter in the water and it does not affect the way water tastes or smells. UV radiation has only been used in the U.S. to disinfect water since 1916 but sunlight was known to disinfect water in ancient Greece and India and UV is now commonly used in municipal water purification plants.
There are four basic methods of portable water treatment: chemicals, filtration, heat, and ultraviolet radiation. A full comparison is beyond the scope of this review but some of the advantages of the SteriPEN are ease of use, moderate weight, and ability to disable viruses that cause hepatitis, gastroenteritis, polio, SARS, etc. in addition to bacteria and protozoa. It is also easy to use and fast at ninety seconds for a liter and under a minute for a half liter. Ingesting added chemicals is avoided.
Some of the disadvantages with a SteriPEN are that the water needs to be clear and colorless because UV cannot penetrate particles and so it may be necessary to pre-filter. Some water, such as that with heavy coloring of tannic acid from leaves, is unsuitable for this method of treatment. The water must be agitated or stirred while the UV is working. It can only effectively treat up to one liter at a time. The battery cap must be aligned properly for the device to work but it will seal in other positions to prevent accidental activation. The batteries may not work very well at low temperatures or may be depleted and the particular batteries (lithium or NiMH, not alkaline) may be hard to find locally or expensive. The unit may be damaged if dropped. UV may not be effective against parasites. There is no residual effect from the treatment as there is with chemicals.
No method of water treatment is perfect for every situation but for people who will be drinking relatively clean and colorless municipal, well, spring, or bottled water that merely requires disinfection to render microorganisms harmless, the SteriPEN is ideal.
Read the full review for more information about this product.
SteriPEN Emergency by Hydro-Photon Price
List Price: | $49.95 |
Price: | $49.65 & this item ships for FREE with Super Saver Shipping. |
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SteriPEN Emergency by Hydro-Photon Overview

Sorry i dont have complete description for this product.
SteriPEN Emergency by Hydro-Photon Features
- Compact handheld UV water purifier designed specifically for emergencies
- Destroys more than 99.9 percent of harmful microorganisms, including Giardia
- Safe and effective without altering taste, pH, or other properties of water
- Purifies 200 half-liter servings of water per 4 AA lithium batteries (not included)
- Measures 1.5 x 7.6 x 1.5 inches (W x H x D); weighs 5.7 ounces
Color: Red | Size: One Size
SteriPEN Emergency by Hydro-Photon Detail
- Shipping Information: View shipping rates and policies
- ASIN: B0050AK7XA
- Average Customer Review: (32 customer reviews)
- Amazon Best Sellers Rank: #12,813 in Sports & Outdoors (See Top 100 in Sports & Outdoors)
- #5 in Sports & Outdoors > Outdoor Recreation > Camping & Hiking > Hydration > Chemical Water Treaters
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