Oceanic

Oceanic Delta 5 / EDX (DIN)

A current, purpose-built cold-water mid-tier reg from Oceanic with a sealed, over-balanced diaphragm first stage.

Environmentally sealed, cold-water rated

Sealed first stage keeps water and ice crystals out of the internal mechanism, the standard for diving below 50°F/10°C.

Oceanic Delta 5 / EDX (DIN)
4.1Comparison Score
$614.95
Buy on Amazon
Released2017
First stagediaphragm
BalancedYes
Environmentally sealedYes
Cold-water ratedYes
ConnectionDIN
Max pressure—
HP / LP ports2 / 4
Adjustable 2nd stageYes
Weight—
Nitrox-ready (EAN40)Yes
Octo includedNo

"HP / LP ports" is the number of high-pressure and low-pressure ports on the first stage, which caps how many accessories (transmitter, SPG, inflator, second second-stage) you can run at once.

Pros
  • Purpose-built for cold water with a sealed, over-balanced diaphragm first stage and heat exchanger, not a warm-water reg retrofitted for cold
  • Dynamic Airflow Adjustment control plus a dive/pre-dive switch give real diver-adjustable breathing control
  • Solid mid-range pricing for a sealed, balanced, cold-water-rated set
Cons
  • Weight isn't published anywhere we could find for this specific first-stage/second-stage pairing, hard to compare against competitors on portability
  • DIN pressure rating isn't clearly stated by Oceanic for this model, unusual for a modern spec sheet
  • Independent long-form reviews are thin compared to competitors, most available write-ups read as promotional
Diver community sentiment
Mostly positive

Independent testing (Scuba Diving Magazine's ScubaLab) and owner reviews consistently praise the Delta 5/EDX combo for smooth, dry, easy breathing including at depth and in cold water, largely crediting the diaphragm first stage and heat exchanger; it won a "Testers Choice" award for regulators under $600. Real owner reviews echo this, though at least one owner noted it is noticeably harder to breathe face-up, working fine facing downward. On Scubaboard, posters flag a real caveat with Oceanic's "parts for life" servicing program: it requires annual servicing without fail or the warranty lapses, and such lifetime programs have historically been discontinued by other brands. No recurring free-flow or failure complaints specific to this model turned up.

Scubaboard: Delta 5 EDX vs Scubapro MK11/C370Scubaboard: Delta 5 EDX pros/consScuba Diving Magazine: ScubaLab Testers Choice

Summarized from public forum discussion (Scubaboard, Reddit, and similar), not a survey we ran ourselves. See the linked threads for the original conversations.

The Delta 5/EDX is Oceanic’s current mid-tier, cold-water-focused reg, built around a sealed and over-balanced diaphragm first stage. It’s positioned as the step up from Oceanic’s warm-water-oriented entry regs for divers who actually need cold-water performance, without moving all the way up to the Zeo.