Atomic Aquatics vs Zeagle
B2 Regulator vs Onyx II Regulator
Which regulator would we put in our own kit?
Atomic Aquatics
Zeagle
Scores are our editorial opinion of these models, based on features, suitability and ownership trade-offs—not hands-on test results. How we chose →
We’d pick the B2 Regulator.
We’d start with Atomic Aquatics B2 Regulator. Our favourite for most recreational buyers in this group. The brass first stage, Automatic Flow Control and swivelling hose connection make a thoughtful everyday package. Choose Zeagle Onyx II Regulator instead if its strengths are a better match: the dry seal, five low-pressure ports and adjustable second stage make Onyx II a strong all-round buying option.
Which one suits you?
Atomic Aquatics B2 Regulator
Our favourite for most recreational buyers in this group. The brass first stage, Automatic Flow Control and swivelling hose connection make a thoughtful everyday package. Check the sealed or unsealed version and the local service quote before ordering.
Get to know this model →Zeagle Onyx II Regulator
The dry seal, five low-pressure ports and adjustable second stage make Onyx II a strong all-round buying option. Try the adjustment and purge with gloves, and include servicing in the ownership budget.
Get to know this model →Specifications side by side
The details that matter, side by side. “Check with the brand” means we have not confirmed that detail.
| Detail | Atomic Aquatics B2 Regulator | Zeagle Onyx II Regulator |
|---|---|---|
| First-stage materialCheck with the brand | Chrome-plated brass | Check with the brand |
| Connections listedCheck with the brand | DIN and yoke; sealed variants available | Check with the brand |
| First stageCheck with the brand | Check with the brand | Balanced; dry environmental seal |
| PortsCheck with the brand | Check with the brand | 5 LP; 2 HP |
| Second-stage controlsCheck with the brand | Check with the brand | Venturi lever and inhalation adjustment |
| HoseCheck with the brand | Check with the brand | 30 in / 0.76 m braided |
| ConnectionCheck with the brand | Check with the brand | DIN or yoke |
Showing all 7 specification rows.
What the differences mean when you buy
Exact first-stage configuration
Atomic Aquatics B2 Regulator
- Connections listed
- DIN and yoke; sealed variants available
Zeagle Onyx II Regulator
- First stage
- Balanced; dry environmental seal
- Connection
- DIN or yoke
- Ports
- 5 LP; 2 HP
Start with the complete model and connection, including the selected sealed or unsealed variant. A family name can cover several configurations. Ask the dealer to confirm hose routing against the actual port arrangement and the approved cylinder connection. Missing port or sealing information should be resolved, not inferred from a nearby model.
Second-stage controls and construction
Atomic Aquatics B2 Regulator
Ask the brand about this detail before ordering.
Zeagle Onyx II Regulator
- Second-stage controls
- Venturi lever and inhalation adjustment
Handle the purge and adjustment controls with your gloves and assess the mouthpiece fit. A Venturi lever and an inhalation adjustment are different controls. Exhaust placement and moisture-related features may be reasons to investigate a model, but they do not establish measured comfort, lower breathing effort or improved reliability without suitable comparative testing.
Materials and complete package
Atomic Aquatics B2 Regulator
- First-stage material
- Chrome-plated brass
Zeagle Onyx II Regulator
- Hose
- 30 in / 0.76 m braided
Compare materials at the named component, not across the whole regulator by implication. A titanium-finish detail is not a titanium first stage. Obtain the assembled weight and package list if travel matters. A first-and-second-stage set may still need an alternate second stage, pressure measurement and inflator hoses before it matches your required configuration.
A closer look at both
B2 Regulator
The B2 pairs a chrome-plated brass first stage with Atomic’s titanium second-stage design. DIN, yoke and sealed configurations appear in the manufacturer catalogue.
What we like
Our favourite for most recreational buyers in this group. The brass first stage, Automatic Flow Control and swivelling hose connection make a thoughtful everyday package.
What would make us think twice
Check the sealed or unsealed version and the local service quote before ordering.
More about the B2 Regulator →Onyx II Regulator
The Onyx II combines a balanced first stage with a dry environmental seal and a compact second stage with an inhalation adjustment. Five low-pressure and two high-pressure ports provide routing options, while the 30-inch braided hose and aluminium heat sink are part of the specified package. DIN and yoke versions are offered.
What we like
The dry seal, five low-pressure ports and adjustable second stage make Onyx II a strong all-round buying option.
What would make us think twice
Try the adjustment and purge with gloves, and include servicing in the ownership budget.
More about the Onyx II Regulator →Four checks before you place an order
- Ask an authorised dealer to identify the exact first stage, second stage, connection and sealing variant on the quotation.
- Have compatibility, operating conditions and hose routing checked for the equipment configuration you intend to use.
- Try the mouthpiece and controls, and ask what accessories and hoses are included.
- Obtain current inspection, servicing, warranty and parts-support requirements in writing, especially where a product page contains conflicting intervals.
Ask for a quote for the complete kit, including the accessories you need. That makes the price comparison much more useful.
Price, accessories and owning the equipment
Compare complete system quotations and local service support. A lower regulator-only price can be offset by missing components, shipping for servicing or incompatible existing hoses. No current matched price, service-cost history or breathing-machine result is available for every pair here, so we do not manufacture a value or performance score.
If replacing a functioning set, name the specific unmet requirement first: connection, supported configuration, controls, routing or service availability. Materials and range position alone do not prove that a replacement will breathe better. Installation and servicing should follow the manufacturer requirements through appropriately qualified support.
How we scored these models & further reading
These are our subjective buying scores out of 100. We weigh the usefulness of the features, the intended diving or carrying job, and the compromises involved in owning the gear. They are not laboratory measurements, safety grades or customer averages. The verdict applies to the two named models, not everything either brand makes.
90–100: one of our first choices for the stated job. 80–89: a strong option with trade-offs. 70–79: a more specific fit. A different fit, camera, valve or dive plan can change which one you should buy.
Atomic Aquatics B2 Regulator
Product details and further reading →Zeagle Onyx II Regulator
- Manufacturer details
- Scuba Diving / ScubaLab: 20 Scuba Diving Regulators Reviewed By ScubaLab
- DIVER / Divernet: Zeagle Onyx II and Envoy octopus — DIVER Tests, June 2021, pages 66–68
Questions worth settling
Does an environmental seal prove cold-water suitability?
A seal is one documented design feature, not blanket approval for every temperature, configuration or diving use. Verify the exact set, current manufacturer instructions and applicable certification with qualified support. This article is a buying comparison, not regulator-configuration instruction.
Which is the better buy for this particular comparison?
Atomic Aquatics B2 Regulator: Check the sealed or unsealed version and the local service quote before ordering. Zeagle Onyx II Regulator: Try the adjustment and purge with gloves, and include servicing in the ownership budget.
Our pick is where we would start. Choose the other model if its fit or features better match your setup—especially where a camera, valve, boot or exposure suit needs an exact match.
