Shearwater Perdix 2 Ti Review: The Technical Diver’s Workhorse

If you walk into any technical diving course or visit a serious wreck diving destination, you’ll see Shearwater computers on more wrists than any other brand. The Perdix 2 Ti is the titanium-bezeled version of Shearwater’s most popular dive computer, and it’s earned its reputation through consistent reliability and user-replaceable batteries. I’ve been using mine for over two years across everything from pool sessions to 70-meter wreck dives, and I’ve watched countless students and colleagues trust their decompression diving to this computer. At $1,195, it’s positioned as a mid-to-high-end technical computer that balances advanced features with practical design. The main reason technical divers choose the Perdix 2 Ti is simple—it works, the battery lasts, and you can swap it yourself in the field.

What’s In The Package

The Shearwater Perdix 2 Ti dive computer comes with elastic bungee straps, a bungee cord option for mounting, and a zippered ballistic nylon carrying case. One AA battery is included and installed. The computer weighs 266g and measures 81 x 71 x 38mm, making it compact but substantial. The 2.2-inch LCD screen uses LED backlighting and displays 320 x 240 pixels protected by aluminosilicate glass. The titanium bezel surrounds the armored case, and titanium piezo buttons ensure leak-proof operation to 260m (850 feet). The battery delivers 60 hours with standard lithium 1.5V cells, or up to 100 hours with high-capacity Saft LS14500 batteries. Shearwater offers this in black, silver, and a bronze Journey Edition with different bezel colors.

Real-World Diving Experience

Display Quality

The 2.2-inch screen is smaller than the Garmin X50i’s 3-inch display, but Shearwater’s high-contrast design makes it remarkably easy to read. The LED backlight is bright enough for night diving without being distracting, and the screen performs exceptionally well in direct sunlight. I’ve never had trouble reading my decompression information at any depth or lighting condition. The display shows all critical data on one screen—depth, time, decompression status, gas mix, and tank pressure when using wireless air integration. Many technical divers I know specifically prefer this screen size as the sweet spot between readability and wrist profile.

Algorithm Options and Flexibility

The Perdix 2 Ti runs the Bühlmann ZHL-16C algorithm with fully adjustable gradient factors, which is the gold standard for technical diving. You can also switch to VPM-B or DCIEM algorithms if you prefer. The gradient factor customization lets you dial in your conservatism exactly where you want it. Common feedback from technical instructors is that students find the Shearwater’s decompression display intuitive—it clearly shows your ceiling, time to surface, and safety stop requirements. The computer handles open circuit technical diving, closed circuit rebreather diving with bailout support, and gauge mode. Gas switching is straightforward with the piezo buttons, even while wearing thick gloves.

User-Replaceable Battery

This is where the Perdix 2 Ti stands out from competitors. The AA battery is user-replaceable, and you can do it yourself in under a minute with the included battery kit. No sending your computer away for battery service, no proprietary charging cables to forget. On dive trips, I carry spare batteries and swap them between dive days. With standard lithium cells lasting 60 hours, you get multiple weeks of diving from one battery. Technical divers doing long decompression dives particularly appreciate knowing they can field-replace the battery anywhere in the world. It’s basic, reliable, and removes battery anxiety completely.

Air Integration

The Perdix 2 Ti supports wireless air integration through Shearwater’s Swift transmitters, pairing with up to four transmitters simultaneously. This covers most technical diving scenarios where you’re monitoring multiple stage bottles. The low-frequency 38kHz signal is reliable even in overhead environments where radio-frequency transmitters sometimes struggle. Tank pressure updates every few seconds, and the computer calculates your gas time remaining based on your current breathing rate. The integration is seamless—if you lose the wireless signal, the computer continues functioning in gauge mode without interruption.

Compass and Navigation

The 3-axis tilt-compensated digital compass works well for basic navigation. It’s responsive and calibrates quickly. You won’t find GPS or dive site maps like the Garmin computers offer, but for underwater navigation, the compass handles what most divers need. In my experience, the compass is accurate enough for wreck diving and following reef structures. It’s not trying to be a comprehensive navigation system—it’s a solid dive compass integrated into your computer.

Durability and Build Quality

Shearwater builds tough computers, and the Perdix 2 Ti reflects that. The titanium bezel resists scratches and corrosion, and the piezo buttons are completely sealed with no moving parts to fail. I’ve seen these computers take serious abuse—dropped on boat decks, banged against wrecks, used in cold water and tropical heat—and they keep working. The 260m depth rating exceeds what most technical divers will ever need. Many dive centers use the standard Perdix 2 (non-titanium) as rental computers, which tells you something about their reliability under constant use.

Comparing the Perdix 2 Ti

The Perdix 2 Ti competes directly with the Garmin Descent X50i ($1,500) and Apeks DSX ($1,199). Against the X50i, the Perdix offers better battery life, deeper depth rating, and user-replaceable power, but gives up the larger 3-inch screen and SubWave team communication features. If you’re diving solo or in buddy pairs, the Perdix is better value. The Apeks DSX at $1,199 includes an integrated oxygen analyzer and induction charging, appealing to tech divers who want modern conveniences. The DSX’s 100m depth rating versus the Perdix’s 260m makes the Shearwater the clear choice for deeper technical diving. For recreational divers moving into technical diving, the Perdix 2 Ti provides everything you need without features you’ll rarely use. It’s the computer you can trust for your first trimix dive and your hundredth.

What We Think

The Shearwater Perdix 2 Ti’s strengths are reliability and simplicity. The user-replaceable AA battery removes a major pain point of dive computer ownership. The screen is highly readable, the interface is logical, and the algorithm options cover everything from conservative recreational diving to aggressive technical profiles. The 260m depth rating and proven build quality mean you won’t outgrow this computer. The downsides are minimal—the screen is smaller than the X50i, and there’s no GPS or surface navigation features. It’s best for technical divers, instructors who need reliability, and serious recreational divers who want a computer that will last years without compromising on features. Skip it if you want the latest smartwatch integration or if team diving communication features matter to your diving.

Final Verdict on the Perdix 2 Ti

Buy the Shearwater Perdix 2 Ti if you’re a technical diver who values reliability and field serviceability above all else. It’s the right choice for wreck divers, cave divers, and anyone doing decompression diving where you need to trust your computer completely. The user-replaceable battery and 260m depth rating make it ideal for remote dive destinations and serious technical diving. Instructors teaching technical courses appreciate that students can learn on the same computer they’ll use for advanced diving. Skip this computer if you want a large 3-inch display or if GPS navigation and dive site mapping are important to you. Also consider other options if you prefer rechargeable batteries and modern charging convenience over field replaceability. The Perdix 2 Ti is the workhorse technical computer—it does exactly what it’s designed to do, does it reliably, and doesn’t try to be anything else.