SteriPEN Classic 3 with Pre-Filter


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Product Details

Trusted and relied upon by trampers for over 20 years, the SteriPEN® Classic is the best-selling portable UV purifier of all time. Since 1999, hundreds of thousands of people have made sure their drinking water is safe with a SteriPEN® Classic.


The latest SteriPEN Classic operates on four AA batteries. With one set of alkaline batteries, the Classic 3 will sterilise up to 50L of water. If you choose to go with lithium batteries, your Classic 3 will treat up to 150L of water. With a lamp life of up to 8,000L,  you can be sure to be drinking safe water for a long time!


The 40×40 micron screened Pre-Filter fits perfectly on standard wide-mouth 1L water bottles and removes particulates that can prevent the full UV light treatment in water. The Pre-Filter is designed to be stored directly on a wide mouth bottle and the SteriPEN Classic 3 fits perfectly in the filter. Just insert Classic 3 in the filter opening, turn the bottle upside down, and gently rock to circulate light throughout the bottle.


Weight 82 g
Dimensions 186 x 43 x 43mm
Lamp Life up to 8,000 activations


4 AA batteries – Alkaline, Lithium or Rechargeable NiMH (Not included with purchase)

Battery Life

  • Alkaline: 100 treatments (0.5L) or 50 treatments (1L)
  • Lithium Disposable: 300 treatments (0.5L) or 150 treatments (1L)
  • NiMH: 200 treatments (0.5L) or 100 treatments (1L)

Min. Bottle Dia.

22mm (0.8 inches)

Filter Compatibility

SteriPEN Pre-Filter Included


  • Ergonomic design with a new easy-to-remove twist-off cap.
  • The first SteriPEN to work effectively with alkaline batteries. Can be powered by alkaline, lithium, or NiMH batteries.
  • Enhanced LEDs indicate the treatment size and status of batteries and the lamp.
  • Watertight. No more worries about dropping your Classic 3 in a bottle or stream.
  • So easy … just activate, place in water, and stir. LED indicators flash to let you know when water is safe to drink.


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