The Apollo Reg Bio A-320 Din Nitrox Bio A-320 Din Nitrox with Adjustable 2nd Stage is a second-stage regulator from Apollo – the piece that delivers air to your mouth on demand. Balanced and responsive, it breathes effortlessly at depth, making every breath as easy as the last whether you’re cruising the reef at Sipadan’s UNESCO reef walls or hovering in the blue.
Technical Specifications
| Specification | Details |
| Brand | Apollo |
| Product | Reg Bio A-320 Din Nitrox Bio A-320 Din Nitrox with Adjustable 2nd Stage |
| Stage | 2nd Stage |
| Type | Piston |
| Material | Chrome / Brass |
| Connection | DIN / Yoke |
| Best For | Recreational diving |
Key Features
- Balanced demand valve: Delivers air smoothly and effortlessly at any depth.
- Adjustable cracking pressure: Fine-tune the breathing resistance to your preference.
- Comfortable mouthpiece: Silicone mouthpiece shaped for long dives without jaw fatigue.
- Purge button: One-touch clearing keeps the regulator ready to breathe.
Suited for Malaysian Dive Sites
The Apollo Reg Bio A-320 Din Nitrox Bio A-320 Din Nitrox with Adjustable 2nd Stage is built to perform across Malaysia’s best underwater destinations. Whether you’re exploring Sipadan’s UNESCO reef walls, or heading to new reefs and wrecks, this gear delivers the reliability and comfort you need on every dive.
Care & Maintenance
- Rinse after every dive.
- Purge a few times before and after each dive to flush sand.
- Replace the mouthpiece when it starts to harden or crack.
- Service alongside the first stage – they’re a system.
Final Verdict
Every breath underwater starts here. The Apollo Reg Bio A-320 Din Nitrox Bio A-320 Din Nitrox with Adjustable 2nd Stage delivers smooth, effortless air at any depth – exactly what you want from a second stage.




Marcus Lim –
Used the Apollo Reg Bio A-320 Din Nitrox for my recent dive trip to Tioman. The breathing comfort was excellent even during multiple deep dives, and the adjustable airflow really helped in strong current. Only downside, the mouthpiece felt slightly stiff at first but softened after a couple of uses.
Junhao Lo –
Thank you, Marcus, for sharing your experience and feedback. We’re glad the regulator’s comfort and performance met your expectations, and we appreciate your note about the mouthpiece—it’s normal for it to become more comfortable after a few uses. If you need further advice on care or replacements, feel free to contact us anytime.
Siti Rahman –
Does this regulator come with a warranty, and if so, how long is it? I want assurance for extended use and travel.
[email protected] –
Hi Siti, yes, the Apollo Reg Bio A-320 Din Nitrox comes with a standard manufacturer’s warranty of 2 years from the date of purchase. If you plan to travel or use it intensively, please remember to register your product and keep the proof of purchase for support.
Priya Menon –
Impressed with the bio-filter feature—noticed my throat felt much better after longer dives. No issues with cold water either during my last dive in Bali. Highly recommend for divers who often feel dryness underwater.
Imran Hanafiah –
Thank you, Priya, for your positive feedback and recommendation. We’re delighted the bio-filter and cold water performance enhanced your diving experience. If you have any further questions about maintenance or use, do let us know.