How many different gas types can the Perdix 2 Ti Scuba Diving Computer support?

You must verify your specific gas mixtures are compatible with the device’s firmware limits before planning a dive. We selected the Perdix 2 for our spec breakdown because of its high gas-switching versatility among the scuba diving computers we evaluated.

You can find a deep dive into the technical specs in our full Perdix 2 review.

Perdix 2 Ti supports five different open circuit and closed circuit gas types

The Perdix 2 supports both Open Circuit diving—where gas is breathed from a cylinder and released into the water—and Closed Circuit systems, which include rebreather gas modes. This diversity is critical for divers who switch between Nitrox (oxygen-enriched air) and Trimix (a mixture of helium, nitrogen, and oxygen used for deep dives). Because the device supports 5 of each type, you can configure multiple gas profiles to match your specific needs. If you select an unsupported gas mixture, you risk the device failing to provide accurate decompression data, which could result in a costly and dangerous dive failure. For a scuba diving computer buyer, gas compatibility is vital because the device must accurately calculate your remaining time based on the specific chemistry of the gas you are currently breathing.

For a final summary of the pros and cons, see the final Perdix 2 verdict.

What to Check Before Buying the Shearwater Perdix 2

Check these gas and configuration details to ensure the device meets your requirements:

If you need a quick overview, look at our quick Perdix 2 verdict.

• Confirm the device supports the specific number of gas switches required for your planned Trimix or Nitrox profiles.
• Verify if your specific gas mixture requires a software-based confirmation or a physical button for switching.
• Check for any firmware-enforced depth ceilings that might limit the use of certain gas types at your target depth.
• Ensure the 1,000 hours of dive log storage is sufficient for your planned dive frequency.

Choosing the Right Scuba Diving Computer

The Perdix 2 is a high-end dive computer, which is a wrist-mounted screen that tracks your depth and remaining air time. It is a strong choice for technical divers who require complex gas switching and long battery life, such as the 100 hours provided by Saft LS14500 batteries. If you only perform basic recreational dives with a single gas type, you might find more economical options that provide the same 260m depth rating without the advanced gas-switching capabilities of the Perdix 2.

Divers using enriched air gas should consider the best dive computer for nitrox.

If you are a technical diver who frequently switches between multiple gas mixes like Trimix and Nitrox, you should choose the Shearwater Perdix 2.

Reviewed by the Scuba Forge editorial team. Scuba Forge writes these guides from the 200 most-reviewed scuba diving computer listings in our retail dataset, not from manufacturer copy.