Support & Downloads


1.5V non-rechargeable lithium batteries like the Energizer Ultimate Lithium batteries have the best overall performance characteristics for use in the Perdix 2 and Petrel 3.

Vibration functions will only work with these as well as 3.7V lithium rechargeable batteries.

Energizer Ultimate Lithium Batteries are much less likely to leak and cause computer damage. These batteries come with a ""No Leak Guarantee"",383%2D7323%20for%20return%20instructions.

No. There is an AI version only for the Perdix 2.

Yes. Both the Perdix 2 and Petrel 3 will work with the Legacy transmitters.

No. The titanium bezel and buttons are unique to the Perdix 2 and we cannot retrofit them to the Perdix or Perdix AI. However, your nearest Shearwater Service Centre will be happy to help if you require service of your current model.

No. Shearwater does not operate a trade in program. Contact your local Shearwater dealer for pricing and availability of a Perdix 2. Or try before you buy at a Shearwater Authorized Demo Centre dealer.

The Perdix 2 comes with a strong customizable vibration alert system. This is more effective than sound which can be difficult to hear when diving with a hood, or ascertain which computer is sounding an audible alarm when diving in a small group.

No. Your new Shearwater computer comes with a 2 year warranty from the date of purchase from your Shearwater dealer. The warranty lives with the computer rather than the diver and there is no need to register it with us. We suggest retaining your proof of purchase.

We strongly recommend that if you are not diving your Shearwater computer for an extended period of time, that you remove the battery to avoid the leaks and damage that can happen in any electronic device. Your dives and data is securely stored on the computer, even when the battery is removed. For more information on battery removal, see the Perdix 2 instruction manual.

Shearwater recommends service of your dive computer every 2 years by an authorized service centre.

The transmitters we supply are suitable for use with up to 40% O2 Nitrox. The question of usage with 100% O2 has a complex answer because there is no widely recognized scuba diving standard for what constitutes suitability for oxygen service. Hypothetically, the transmitter could be used with oxygen if we describe it as Nitrox Ready, otherwise you should assume air only service. The reason why we can't give you a simple unqualified "YES" is related to the associated risks when the circumstances of use are completely outside our control. To dive using oxygen requires you to make an informed decision to accept for yourself the risks of handling the oxygen.

AI will not affect the battery life of the Perdix 2 when it is turned off. If the Perdix 2 has AI enabled, power usage when on will increase by a small amount (roughly 10%, but this will vary) with one transmitter and a little more with two transmitters. If a transmitter is not being used, it is recommended that it be disabled (does not need to be unpaired) in the Perdix 2 system menu.

No, the Perdix 2 is a stand alone only product. The Perdix 2 does have a rebreather (CC) mode that uses internal fixed PPO2 setpoints. This is useful for calculating backup decompression schedules when diving a closed circuit rebreather. The Petrel 3 will be sold in the Fischer and DiveCAN models for connecting to a rebreather.

The Perdix 2 will automatically turn-on when submerged underwater. This is based on pressure increase and not on the presence of water (i.e. the Perdix 2 does not have wet contacts). This feature is supplied as a backup for when you forget to turn on your Perdix 2. We recommend turning on manually before each dive to confirm proper operation and to double check battery status and setup. Details: The Perdix 2 turns on automatically when the absolute pressure is greater than 1100 millibar (mbar). It can take up to 15 seconds for the Perdix 2 to activate once 1100 mbar is exceeded. For reference, normal sea level pressure is 1013 mbar and 1 mbar of pressure corresponds to approximately 1 cm (0.4"") of water. So the Perdix 2 will automatically turn-on when about 0.9 m (3 ft) underwater when at sea level. If at higher altitude, then the Perdix 2 auto-on will occur at a deeper depth. For example, when at 2000 m (6500 ft) altitude the atmospheric pressure is only about 800 mbar. Therefore, at this altitude the Perdix 2 must be submerged underwater by 300 mbar to reach an absolute pressure of 1100 mbar. This means the auto-on occurs at about 3 m (10 ft) underwater when at an altitude of 2000 m.

The Shearwater Perdix 2 should be stored in a clean, cool and dry environment. Do not allow salt deposits to build up on your dive computer. Wash your computer with fresh water to remove salt and other contaminants. Do not use detergents or other cleaning chemicals as they may damage the Perdix 2 dive computer. Allow to dry naturally before storing. Do not wash with high pressure water as it may damage the depth sensor. Store the Perdix 2 upright and out of direct sunlight in a cool, dry and dust free environment. Avoid exposure to direct ultra-violet radiation and radiant heat. Do not store batteries in the Perdix 2 for long periods (several months). Batteries can and do leak, so don’t risk your expensive computer on a simple task like removing batteries. Dead batteries are at a higher risk of leaking.

The standard decompression model is Bühlmann ZHL-16C with Gradient Factors. Also, the VPM-B decompression model and DCIEM is available by purchasing an unlock code. More information can be found in the Perdix 2 manual. Recommended reading is "Clearing up the Confusion About Deep Stops" - Eric C. Baker, P.E.

The Perdix 2 pairing to transmitters is via manual entry to ensure that the correct transmitter is paired for the safety of air pressure and gas time remaining displays.

Once paired the Perdix 2 will remember the transmitter serial numbers until un-paired or changed, even with battery replacement.

In Gauge Mode the Perdix 2 does not know what gas you are breathing and therefore cannot track the inert gas tissue loading.

While almost any kind of AA battery will work with your Shearwater Perdix 2, 1.5V lithium batteries like the Energizer Ultimate Lithium work best. This battery type performs well in a wide temperature range and is much less likely to leak and cause damage to your dive computer. Read more here:

Here are the supported battery types:

Battery TypeApprox.
Battery Life
Cold water
1.5V Lithium
60 hoursYesYesVery Good
1.5V Alkaline45 hoursNoYesOk
1.2V NiMh Rechargeable30 hoursNoNoPoor
3.6V Saft LS14500130 hoursNoNoPoor
3.7V Li-ion Rechargeable35 hoursYesYesGood

For more info, please refer to the Perdix 2 manuals:
Perdix 2 Recreational Manual | Perdix 2 Technical Manual

Firmware Updates

Current Firmware Version: V92

Update instructions

Note: Updating the firmware will reset the decompression tissue loading.

  1. Ensure that you have the latest Shearwater Cloud installed
  2. In Shearwater Cloud, go to Dive Computer > Update Firmware...
  3. On your Perdix, navigate to Start Bluetooth or  System Setup > System Setup > Load Upgrade, depending on your firmware version
  4. Shearwater Cloud will detect your Perdix and select the latest available firmware.
  5. Follow the instructions in Shearwater Cloud to select your firmware language and begin the update.

Getting Firmware Files

The easiest way to update your firmware is to download the new Shearwater Cloud and select Dive Computer-> Update Dive computer.  Follow the instructions on the screen and Shearwater Cloud will handle the rest.

Support Request


    • For repairs, please contact your nearest Repair Center listed below via email or fill out this form for RMA shipping details when shipping to Canada
    • For sales inquiries, please contact your nearest regional sales representative office.
    • For customer support inquiries, please email
    • For cloud software, bluetooth connectivity and IT support inquiries, please email

    United States Repair Center

    DIVE-Tronix, LLC
    Richard Morton
    +1 858 775 4099
    Snohomish, WA, USA

    Asia Pacific Repair Centre

    United Kingdom Repair Centre

    Narked at 90 Ltd
    +44 1933 681255
    Northamptonshire, UK

    Thailand Repair Centre

    United States Sales

    Curt McNamee
    +1 425 418 1425
    Everett, WA, USA

    Asia Pacific

    Daren Marshall
    Regional Manager APAC
    +61 408 878 678
    LINE ID: @darenmarshall

    Scandinavian & Baltic Sales

    Rannva Joermundsson
    +44 7498 067388
    Cornwall, United Kingdom

    New Zealand Sales

    Canada and California Sales

    Simon Morris
    +1 604 669 9958
    Richmond, Canada