What is the difference between the AdventurerOpti and the Protector? Tim Archambault November 08, 2016 11:14 Updated Follow Protector is made in USA and Adventurer is made in China. Other than that, they are pretty much the same device. Related articles How far should I immerse the SteriPEN ino the water I'm treating? Where can I buy a SteriPEN Protector? Can I use the SteriPEN in very hot water, above 120 degF/60 DegC? Comments 0 comments Please sign in to leave a comment.