Zeagle

Zeagle Onyx II (DIN)

A balanced, dry-sealed diaphragm regulator built for cold water, confirming Amazon's "Balanced Nitrox... Environmentally Sealed" listing language against Zeagle's own spec sheet.

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.

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$549.95
Released—
First stagediaphragm
BalancedYes
Environmentally sealedYes
Cold-water ratedYes
ConnectionDIN
Max pressure—
HP / LP ports2 / 5
Adjustable 2nd stageYes
Weight1250g
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
  • Balanced diaphragm first stage with a dry environmental seal and heat-exchanging hydro transmitter, positioned by Zeagle specifically for cooler water than the standard Onyx
  • Diver-adjustable inhalation effort knob on the 2nd stage, a step up from the Envoy II's fixed venturi-only design
  • Nitrox ready to 40% O2 out of the box, confirmed by both Zeagle and independent specialist retailers
Cons
  • 1-year service interval, shorter than the 2-year interval Zeagle quotes for the pricier F8
  • No octopus included, the Onyx Octo is a separate purchase
  • Also sold in a Yoke version, confirm the listing matches this DIN spec

The Onyx II is Zeagle’s cold-water-focused mid-tier regulator, built around a balanced diaphragm first stage with a dry environmental seal and heat exchanger to resist free-flow in chilly water. Amazon markets this specific listing as a “Balanced Nitrox Scuba Diving Regulator Environmentally Sealed,” and that framing checks out against Zeagle’s own spec sheet and independent retailer documentation.