Choosing dive computers & instruments is really a choice between how you dive and what you want to see underwater. A wrist computer may suit one setup, while wireless tank pressure, a digital compass, multi-gas decompression, or a lower listed price may matter more to another diver. Here is how four used models separate by format, features, condition, and cost.
Quick take
- Best fit for wireless tank pressure and a digital compass: Suunto Eon Core Wrist Dive Computer.
- Best fit for a 55mm case and multi-gas decompression: Shearwater Teric Dive Computer.
- Best fit for a wrist computer without air integration: Shearwater Perdix Wrist Dive Computer.
- Best fit for a PSI console with a compass at the lowest listed price: Aqualung i330R 2 Gauge Scuba Dive Computer Plus Compass.
The main practical split is between the three wrist computers and the Aqualung console. The Suunto is the only model here whose description explicitly combines wireless tank pressure, a digital compass, a color display, and a transmitter. The Perdix is specifically described as lacking air integration, while the Teric stands apart with its 55mm case and multi-gas decompression description.
Listed-price comparison
The prices span $324.99 from the lowest to the highest listed amount. The bars show price position only, not capability or performance.
| Dive computer | Listed price | Price bar |
|---|---|---|
| Shearwater Perdix Wrist Dive Computer | USD 500.00 | |
| Shearwater Teric Dive Computer Black 55mm | USD 624.99 | |
| Suunto Eon Core Wrist Dive Computer | USD 450.00 | |
| Aqualung i330R 2 Gauge Scuba Dive Computer Plus Compass | USD 300.00 |
Decision matrix
- Choose the Suunto Eon Core if wireless tank pressure, a digital compass, large digits, and a color display are central to your setup.
- Choose the Shearwater Teric if the named 55mm case and multi-gas decompression functions are more important than the highest price in this group.
- Choose the Shearwater Perdix if you specifically want a wrist computer without air integration and can accept visible wear and a broken buckle setup.
- Choose the Aqualung i330R if a console format, PSI gauge, compass, rechargeable battery, and the lowest listed price align with your needs.
Product notes
Shearwater Perdix Wrist Dive Computer
If you want a wrist computer specifically without air integration, the Shearwater Perdix is the most direct match in this group. Its description identifies an original-generation, used unit that served as a backup for tech diving and records 54 dives. That gives it a clear role for a buyer who wants the Perdix model without air integration. The tradeoffs are substantial physical wear: scratches on the housing, scratches on the screen protector, and broken buckles with only one arm on the male end. It also comes without a box and is described as the computer alone, so the $500 purchase suits someone comfortable sorting out the strap setup.
Shearwater Teric Dive Computer Black 55mm
Choose the Shearwater Teric when the 55mm case and multi-gas decompression description match your diving priorities. The package is described as including a genuine charger, Shearwater case, documents with carabiner, and an M/L band, giving the purchase a more specifically outlined accessory set than the Perdix. Its listed $624.99 price is the highest of the four, and the unit is used. The description also says that items not listed are not included, so the named package should guide expectations. The Teric is therefore a focused choice for its case size, silicone band, and decompression feature set rather than for minimizing spend.
Suunto Eon Core Wrist Dive Computer
The Suunto Eon Core is a strong match for divers who want wireless tank pressure and a digital compass in a wrist computer. Its description also calls out a clear color display with large digits, wireless mobile connection, rechargeable battery, updatable software, and customizable settings. The title adds a transmitter and USB, making those items part of the named package. At $450, it sits $150 above the Aqualung i330R, while remaining below both Shearwater models. The limitation is its used condition, so the appeal rests on the specific combination of transmitter, compass, color display, and rechargeable design rather than on a new-device purchase.
Aqualung i330R 2 Gauge Scuba Dive Computer Plus Compass
The Aqualung i330R is the straightforward pick for a PSI console with a compass at the lowest listed price. Its description names a bright color screen readable in sunlight, a rechargeable battery, four modes, three nitrox mixes, and Bluetooth, while the title identifies the two-gauge console format. That combination gives buyers several concrete features to weigh at $300. The tradeoff is format: the description identifies it as a dive console, not the wrist-computer format named by the Perdix, Teric, and Eon Core titles. It is also used and described with minor cosmetic signs of use, so the model suits someone prioritizing the listed console features over a wrist-mounted design.
Final recommendation by use case
For wireless tank pressure, a digital compass, and large color-display digits, choose the Suunto Eon Core. For the 55mm case and multi-gas decompression description, choose the Shearwater Teric. For a wrist computer explicitly without air integration, the Shearwater Perdix is the targeted choice if its wear and buckle condition are acceptable. For a PSI console with a compass, rechargeable battery, and the lowest listed price, choose the Aqualung i330R.
