Introduction
The Optimus SteriPen Adventurer Opti is a personal UV water purifier designed for outdoor enthusiasts and travelers. It utilizes UV-C light to effectively neutralize harmful microorganisms in water, providing safe drinking water in various environments. This manual provides essential information for the proper use and maintenance of your SteriPen Adventurer Opti.
Safety Information
WARNING:
- Do not expose eyes or skin directly to the UV light. UV-C light can cause damage.
- Ensure the UV lamp is fully submerged in water during operation.
- This device is intended for clear water. Pre-filter turbid or cloudy water for optimal performance and safety.
- Keep out of reach of children.
- Read the user's guide thoroughly before use.
Legal Disclaimer: NA
What's in the Box
- SteriPen Adventurer Opti UV Water Purifier
- Storage Bag
- Two disposable CR123 batteries (treats 60 L of water)
Features
- UV-C Light Purification: Destroys 99.9% of harmful protozoa, bacteria, and viruses, including Giardia and Cryptosporidium.
- Long-lasting Lamp: Provides up to 8,000 treatments with a single UV lamp.
- Fast Treatment: Purifies 1 liter of water in 90 seconds.
- Compact & Lightweight: Weighs only 3.8 oz with batteries, making it ideal for travel and backpacking.
- Integrated LED Flashlight: The optical sensor doubles as a convenient LED flashlight for nighttime use.
- Battery Powered: Uses CR123 batteries for portability.
- Durable Design: Built to withstand tough outdoor conditions.
Setup
- Unpack: Remove the SteriPen Adventurer Opti and its accessories from the packaging.
- Battery Installation:
The device uses two CR123 batteries. Ensure they are inserted correctly according to the polarity markings inside the battery compartment. The device comes with two disposable CR123 batteries.

Image: SteriPen Adventurer Opti with its cap removed, showing the battery compartment.
Operating Instructions
- Prepare Water: Fill a wide-mouth bottle or container with clear water. If the water is turbid or cloudy, pre-filter it using a cloth or other method to remove particulates.
- Activate SteriPen:
- Press the activation button once for 1 liter of water.
- Press the activation button twice for 0.5 liters of water.
The LED status indicator will flash green, indicating it's ready for treatment.
- Purify Water:
Submerge the UV lamp into the water. Stir the water gently with the SteriPen for the duration of the treatment (90 seconds for 1 liter). Ensure the UV lamp remains fully submerged during this process.

Image: Visual guide showing the three steps: 1. Click button (1x for 1L, 2x for 0.5L), 2. Submerge in clear water and stir for 90 seconds while LED flashes green, 3. Enjoy purified drinking water.
- Completion: A solid green light on the LED indicator signifies that the water purification is complete and the water is safe to drink.
- Flashlight Function: The optical sensor can also be used as an LED flashlight. Refer to the device for specific activation of the flashlight mode.
Video: Official demonstration of the SteriPen Adventurer Opti UV Water Purifier by Katadyn, showing its features and basic operation.
Video: Merchant video showcasing the SteriPen Adventurer Opti UV Personal Water Purifier for camping, backpacking, and emergency preparedness, highlighting its ease of use.
Maintenance
- Cleaning: After each use, gently wipe the UV lamp with a clean, soft cloth to remove any water residue. Do not use abrasive materials or harsh chemicals.
- Storage: Store the SteriPen in its protective storage bag in a dry, cool place when not in use.
- Battery Replacement: Replace batteries when the low battery indicator appears. Always carry spare batteries for extended trips.
- Lamp Life: The UV lamp is designed for up to 8,000 treatments. Monitor the number of uses and consider replacement when nearing the limit or if performance degrades.
Troubleshooting
- Device Not Activating:
- Check battery levels and ensure they are correctly installed.
- Ensure the UV lamp is clean and free of debris.
- Incomplete Purification:
- Verify that the water is clear. Pre-filter if necessary.
- Ensure the SteriPen is stirred continuously for the full treatment duration.
- Confirm the UV lamp is fully submerged during treatment.
- Low Battery Indication: Replace the CR123 batteries with fresh ones.
Specifications
| Feature | Detail |
|---|---|
| Brand | Optimus |
| Model Name | Steripen Adventurer Opti UV Water Purifier |
| Model Number | ADO-MP-EF |
| Purification Method | Ultraviolet (UV-C) |
| Treatment Capacity (Lamp) | Up to 8,000 Liters |
| Treatment Time (1L) | 90 seconds |
| Power Source | Battery Powered (2 x CR123) |
| Item Weight | 6.72 ounces (approx. 190g) |
| Product Dimensions (LxWxH) | 6.1"L x 0.9"W x 1.3"H |
| Special Features | Optical Water Sensor, Integrated LED Flashlight |
| Supported Water TDS Level Maximum | 1000 PPM |
Warranty and Support
The SteriPen Adventurer Opti comes with a 3 Year Manufacturer Warranty. For warranty claims, technical support, or further assistance, please contact Optimus customer service or visit their official website. Always retain your proof of purchase.





