Quick take
When shopping for dive computers & instruments, the difficult choice is often what to prioritize: a particular model, wireless tank pressure, a package with named extras, or a lower purchase price. These four choices also differ in condition, so the right match depends as much on your setup and tolerance for disclosed wear as on the computer itself.
The short version: the Suunto is the instrumentation-led choice; the two Shearwater models are model-led choices; and the Deepblu is the price-and-condition-led choice. The sections below separate price from use case so you can make the choice without treating one feature as universally better.
Listed-price comparison
The four prices span $289.95 to $624.99, an absolute spread of $335.04. The bars show price position only; they do not describe dive 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 | |
| Deepblu Cosmiq+ SCUBA Dive Computer | USD 289.95 |
Decision matrix
- For a named model: Choose the Shearwater Perdix when the original Gen 1 model is the draw. Choose the Shearwater Teric when the Teric model and its 55mm case specification are the priority.
- For named instrumentation: The Suunto Eon Core includes a transmitter and USB in its title, while its description identifies wireless tank pressure and a digital compass.
- For stated activity scope: The Deepblu Cosmiq+ is described for scuba and snorkeling, with dive-profile tracking, safety-margin calculations, and real-time information.
- For condition awareness: The Perdix, Teric, and Eon Core are used choices, while the Cosmiq+ is identified as new. The Perdix also has specific wear and buckle details that deserve extra weight.
Product notes
Shearwater Perdix Wrist Dive Computer
The Shearwater Perdix Wrist Dive Computer makes sense for someone drawn to the original Gen 1 Perdix and its backup-diving role. The description records 54 dives and identifies it as the version without air integration, so its appeal is specific rather than generic. Its main limitation is physical condition: scratches are reported on the housing, the screen protector has not been removed to inspect what lies beneath, and the buckles have only one arm on the male end. It arrives without a box and consists of the computer, with blue bungees possibly included. Choose it when those condition details are acceptable and the original Perdix name matters.
Shearwater Teric Dive Computer Black 55mm
The Shearwater Teric Dive Computer Black 55mm fits when the Teric model itself is the priority. Its package names a silicone band, genuine charger, Shearwater case, documents with carabiner, and multi-gas decompression. Those inclusions give the purchase a defined shape without requiring you to assemble the core package separately. The limitation is that the unit is used, and accessories beyond the computer, charger, case, and documents should not be assumed. Choose it when the Teric model and its named package matter more than selecting a different model.
Suunto Eon Core Wrist Dive Computer - White with Transmitter And USB
The Suunto Eon Core Wrist Dive Computer is a practical pick for a diver who wants a readable display alongside a rechargeable, updatable computer. Its clear color display and large digits are a concrete reason to choose it, while the title's included USB adds a defined accessory to the package. Customizable settings further suit someone who wants to adjust the computer to their preferences. The limitation is the used condition, so visible wear and previous ownership are part of the decision. The named unit is white, another visual detail to factor into a gear setup. Choose it when readability and customization matter more than selecting solely by price.
Deepblu Cosmiq+ SCUBA Dive Computer - Purple
The Deepblu Cosmiq+ SCUBA Dive Computer in Purple suits someone looking for a new unit whose description centers on tracking dive profiles, calculating safety margins, and providing real-time information for scuba and snorkeling. Its user-friendly interface is another stated reason to keep it in the running. The concrete limitation is the purple finish named in the title: that color may not fit every gear setup. It is also framed around scuba and snorkeling, so it is a more focused match for that activity language than for a shopper choosing primarily around a named model family. Choose it when that stated scope and straightforward interface fit your plans.
Final recommendation by use case
- Wireless tank pressure and compass: Choose the Suunto Eon Core Wrist Dive Computer for the clearest match to those named functions.
- Original Gen 1 model and no-air-integration setup: Choose the Shearwater Perdix Wrist Dive Computer if its disclosed wear and buckle condition work for you.
- Teric-specific choice: Choose the Shearwater Teric Dive Computer Black 55mm when that model and its named package take precedence.
- Lowest listed price with new condition: Choose the Deepblu Cosmiq+ SCUBA Dive Computer - Purple at $289.95.
