Number of Rotations to fully purify 1 liter with the SteriPEN Sidewinder Aaron Cox November 08, 2016 11:14 Updated Follow How many rotations does it take to complete the dose cycle? Related articles After you purchase your SteriPEN!!! Where may I find my SteriPEN's serial number? Can other bottles be used with the Sidewinder? I bought the set Steripen Traveler Ultraviolet Water Purifier & Solar Charger in 2008. Everyth... Comments 1 comment Sort by Date Votes Sheryl White January 05, 2012 14:08 Approximately 300 rotations over the 90 second dosage. Some people might crank faster but all that is required is to keep the red light from flashing on during the dosage. 0 Permalink Please sign in to leave a comment.