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Micro organisms

Microbiological Testing for the Steripen

At HYDRO-PHOTON the manufactuerers of steripen believe thorough testing is essential to the development of safe and reliable products.
As a result we have conducted a wide range of testing both in house and at independent laboratories and test facilities. Testing has focussed on three general areas: microbiological, electronic and mechanical.

Microbiological testing has been conducted at the University of Arizona, the University of Maine, the Oregon Health Sciences University and at Hydro-Photon.

To date SteriPEN™ has been tested against:
E. coli,
Salmonella
Typhimurium,
Poliovirus,
Rotavirus,
Klebsiella
terrigena,
Streptococcus faecalis,
Bacillus subtilis (vegitative and spore),
common yeast,
Coliphage MS2,
Giardia and Cryptosporidum.

Testing shows that SteriPEN™ meets the standard as set forth in the U.S. EPA Guide Standard and Protocol for Testing Microbiological Water Purifiers.

SteriPEN™ has been shown to destroy in excess of 99.9999% of bacteria, 99.99% of viruses and 99.9% protozoa. For full text of SteriPEN™ test reports click on links below.

(Test Reports are in Adobe Acrobat Format).
Anne Hanson, M.Sc., Universite of Maine, Orono, Maine. (27K PDF) Turbid Water Test
Click Here for Report

Anne Hanson, M.Sc., University of Maine, Orono, Maine. (142K PDF) Cryptosporidium Test Ernest A. Meyer, Ph.D. and Shivaji Ramalingam, Ph.D., Oregon Health Sciences University, Portland, Oregon. (118K PDF)
Click Here for Report

Cryptosporidium and Giardia Report Mark D. Sobsey, Ph.D., et. al. University of North Carolina. (357K PDF)
Click Here for Report

< Inactivation of Coccidian Parasites by Water Purification Chemicals and Treatment Device for Campers and Hikers. (2800K PDF)
Click Here for Report

Electronic testing has been conducted in house and at EBW Electronics of Holland, MI. Testing has centered on UV lamp and electronic circuit behavior and reliability. SteriPEN™ lamps and electronics have been successfully cycle tested beyond 14,000 cycles and operated at a range of temperature extremes. Every production assembly will be thoroughly electronically tested with individual test results archived, prior to being packaged. Mechanical Testing has been designed to insure that SteriPEN™ will stand up to some abuse. Pressure testing of seals around lamp and water sensors indicates good water tight integrity. And drop testing from 3 feet onto cement has shown good mechanical integrity with no component failure.