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Item #3543C

SteriPEN Traveler Mini Water Purifier

$62.50 Compare at $89.95 Save 30%
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Closeouts. Perfect for backcountry treks and international travel, SteriPEN's Traveler mini water purifier kills 99.9% of bacteria, viruses and protozoa in a half-liter of water in 48 seconds with a touch of a button.
  • Sleek, compact design is ideal for travel
  • Tested by the Water Quality Association (WQA) against the US EPA Microbiological Water Purifier Standard
  • Received the WQA's Gold Seal, certifying that SteriPEN purifies water safely and effectively
  • Purifies a half-liter of water in 48 seconds, and a liter in 90 seconds
  • Kills 99.9% of bacteria, viruses and protozoa
  • One-button operation
  • Auto timer
  • Use on any source of clear, fresh water
  • Requires two CR123 disposable lithium batteries (not included)
  • UV lamp life: 3,000 treatments
  • Dimensions (HxWxD): 6x1x1-½"
  • Weight: 2.3 oz.
  • Material: Composite
  • Made in China
  • U.S. shipments only
  • Lithium or Nickel Metal Hydride batteries strongly recommended for optimal performance. May be used in glass, plastic, ceramic or metal containers. Should not be used in quartz containers. SteriPEN should be above 32°F(0°C) before using. Read user manual carefully.
  • Reviewed by iluvboston from boston on Saturday, April 06, 2013
    We just got back from Greece and Turkey. I purchased wide mouth water bottles for $1 and we used tap water the whole trip. It was easy and we didn't get sick. I figure we broke even on this trip so the next one we will be saving money. Very easy to use.
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  • Reviewed by topshot from Maine on Thursday, March 07, 2013
    The steriPEN is a great tool, and when I saw it at a great price with my e-coupon, I was excited to add this to my survival ensemble. However, there is a huge caveat: it uses two 123 lithium batteries, and these are getting harder and harder to find in this size, especially the super-long-lasting variety. Therefore, regrettably, I cannot recommend this particular model, and would suggest buying one that uses more common battery types.
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  • Reviewed by Rockymountainhigher from Boulder on Friday, March 01, 2013
    Have not gotten sick yet. Small and light. Batteries not too expensive, like $5 for two at Home Depot or Walmart.
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  • Reviewed by Doc from Canon City, Col on Wednesday, February 27, 2013
    The product is idiot proof. If you can read you can purify your water. It is light weight, compact, and reliable. I use it dayhiking in the mountains of colorado. I also use it as a backup to my Katadyn hiker pro on multi-day backpacking trips. It has been a life saver on two occasions while dayhiking and I ran out of water and needed more but was in Beaver country. The product purified the
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  • Reviewed by wongster82 from NYC on Wednesday, February 13, 2013
    Neat little device for the times you are unsure of the water quality. I usually use it on tap water from outside the country (Asia) that I already boiled. Used it to my trip to Thailand, China, and Hong Kong. Slow process, first off the water needs to be a cool 50ish, and the process takes 1.5 min for a 32 ounce. Overall not too bad, for the price I paid and for the self-assurance.
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Do you have a question about this product?

Get answers from the community and our staff experts!

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  • 1-9 of 9 questions
  • Question “Can I use RCR123A 3.0V 900mAh Rechargeable Li-Ion batteries in this unit?”
    Asked on 2/13/2013 12:00:00 AM by Anon from Unknown
    • Answer As mentioned on our website Lithium or Nickel Metal Hydride batteries are strongly recommended for optimal performance.
      Answered on 2/19/2013 12:00:00 AM by Product Specialist...MEL from Sierra Trading Post
  • Question “Can i use this with rechargeable batteries? I have a steripen with solar recharge capability and wonder about battery compatability”
    Asked on 1/8/2013 12:00:00 AM by Andi from Unknown
    • Answer As mentioned on our website Lithium or Nickel Metal Hydride batteries are strongly recommended for optimal performance.
      Answered on 1/31/2013 12:00:00 AM by Product Specialist...MEL from Sierra Trading Post
  • Question “How much water can this pen proccess on one battery?||Thanks”
    Asked on 3/6/2012 12:00:00 AM by Anonymous from Unknown
    • Answer You can expect around 50 liters using the CR123 disposable lithium batteries. Have a great day.
      Answered on 3/7/2012 12:00:00 AM by STPGearPro_Ryan from Sierra Trading Post
    • Answer The documentation states 800 gallons on the two required batteries.
      Answered on 3/27/2012 12:00:00 AM by Big Tuna from Palos Verdes, CA.
  • Question “Does this parasite girardia?”
    Asked on 2/21/2012 12:00:00 AM by dave from hanover, PA
    • Answer For the best understanding of this product refer to the following link: http://www.steripen.com/stuff/contentmgr/files/1/a6350a3b2838d63edab45ad4623448d7/misc/mini_english.pdf
      Answered on 2/23/2012 12:00:00 AM by Customer care from Sierra Trading Post
    • Answer UV does kill giardia or at least damage giardia so it can't reproduce.
      Answered on 2/27/2012 12:00:00 AM by Bob from Sandy, OR.
  • Question “How much does this unit way and how many ounces/gallons does it service? Also, is this safe to pack on a plane? Would they confiscate it if it was carried on board? Can this be use in any river or stream as long as it is filtered?”
    Asked on 8/26/2011 12:00:00 AM by pam from Unknown
    • Answer It is stainless and the weight is 2.2LBS. You should be okay carrying it on board, but they may search your bag to double check what it is.
      Answered on 8/29/2011 12:00:00 AM by Anonymous from None
    • Answer I don,t think the previous weight estimate is accurate. The Steripen website lists the weight at 3.5 ounces with batteries. Even if this is an older model 2.2 pounds seems way off.
      Answered on 1/29/2012 12:00:00 AM by markly from Humboldt, CA
  • Question “I'm confused about the difference between this (3543C) and the other Steripen (3060D). When I ordered, the description said that this one came with batteries, and the other didn't. But this one didn't come with batteries, and now the description also says that it doesn't come with batteries. Nor do I seem to understand what 'OPTI' in the title means. The package for this doesn't say OPTI on it anywhere; I thought that the OPTI meant that it had some sort of flashlight mode, which I can't seem to find. Can anyone clue me in?”
    Asked on 3/17/2011 12:00:00 AM by Philip from Somerville
    • Answer This pen has a longer battery life with regards to how many uses you have. The models we currently have do not come with batteries.|For more information you can read about the traveler at: http://www.steripen.com/traveler|and the traveler mini: http://www.steripen.com/traveler-mini
      Answered on 3/24/2011 12:00:00 AM by Customer Care from Sierra Trading Post
    • Answer I believe OPTI means that it has the optical sensor, which is an improved model vs the old model with two metal pads. Only the Adventurer OPTI, and the Traveler Mini have this feature. It apparently makes the model work better in very clean and cold water with little minerals in it.
      Answered on 4/2/2011 12:00:00 AM by Doug from Bend, OR
    • Answer The 3543C has to Opti Sensor feature, an optical eye to sense the water (contrary to STP's customer service info). Older models use the conductivity measured between two SS pins to insure the device is in water...harmful UV out of water to user's eyes. The Opti is an incremental improvement to avoid false high conductivity readings in nearly pure water.
      Answered on 5/4/2012 12:00:00 AM by Jim from Northern CO
  • Question “what kind of water would you use it on ?|can you define potable water ?|would this include river/creek water ?”
    Asked on 3/16/2011 12:00:00 AM by Anonymous from NYC
    • Answer You can use this on any source of clear water. Potable just means drinking water, but the only requirement is that it is clear. This works just fine for river/creek water.
      Answered on 3/30/2011 12:00:00 AM by Customer Care from Sierra Trading Post
    • Answer First: potable water is water that is safe for you to drink. You must assume that all water not from a tap or bottle is *not* potable. Steri-Pens are one of the very few water treatments that meets the EPA's guidelines for purity. You can use the Steri-Pen on any type of water. However, if the water is not clear you must first filter it. Second: you need purified water for personal use; your mouth is not the only point at which water enters your body. So even if you are very hot, please don't jump into the creek. Also, make sure you purify the water that invariably gets caught on the lip or rim of your bottle. Lastly, the Steri-Pen cannot desalinate water.
      Answered on 7/7/2011 12:00:00 AM by zedbrad from NW Mtns of GA
  • Question “I have heard that since these use batteries, they don't work well in cold conditions. Any info. on that?”
    Asked on 3/4/2011 12:00:00 AM by agt from Los Angeles
    • Answer It recommends to make sure the SteriPEN is up to a temperature above 32F. They recommend NiMH batteries as the best choice for cold weather. If in cold weather store the batteries in a warm place for better performance.
      Answered on 3/11/2011 12:00:00 AM by Customer Care from Sierra Trading Post
    • Answer Water tends to solidify in less than 32' conditions, and that would be the limiting factor.
      Answered on 4/11/2012 12:00:00 AM by Lars from PNW
  • Question “How do you actually use this? DO you insert it into the water and if so, can you insert this into a bladder from a hydration pack?|thanks”
    Asked on 3/2/2011 12:00:00 AM by Mike from Steubenville, Oh
    • Answer For the best understanding of this product refer to the following link: http://www.steripen.com/stuff/contentmgr/files/1/a6350a3b2838d63edab45ad4623448d7/misc/mini_english.pdf
      Answered on 3/10/2011 12:00:00 AM by Customer Care from Sierra Trading Post
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