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The PSAI Nitrox Diver course combines engaging theory with practical application. While the course is primarily academic, it equips you with the knowledge and hands-on skills to safely plan and execute nitrox dives.
To complete the course, you’ll take a written exam covering nitrox theory, dive planning, and safety protocols. Your instructor will ensure you are confident in using nitrox safely and responsibly.
As always, adventuro lists hundreds of diving tours, lessons and gear rentals—many of which welcome nitrox-certified divers. It's a great way to make the most of your new qualification.
Once certified, you'll be qualified to plan and conduct dives using Enriched Air Nitrox mixtures up to 40% oxygen. This allows for longer bottom times and shorter surface intervals compared to air dives, particularly in the 15–30 m (50–100 ft) range where nitrogen loading becomes a limiting factor. The course enhances your safety margin and reduces post-dive fatigue—especially on multi-dive days or liveaboard trips. Many dive operators worldwide offer nitrox as a premium or standard gas, and having your certification allows you to take full advantage of these opportunities.
It’s also a key prerequisite for further technical diving training, such as Advanced Nitrox or Decompression Procedures courses. Whether you're aiming to explore more in a single dive or build toward more advanced certifications, Nitrox Diver is a smart and practical step forward in your diving journey.
The PSAI Nitrox Diver course is usually completed in one day, consisting of classroom-based theory sessions and practical workshops. Some centres may include a single training dive, but this is not always mandatory depending on local regulations and instructor discretion.
The PSAI Nitrox Diver certification course includes both theory and practical assessments. You'll begin with classroom sessions or e-learning modules that cover the benefits and risks of using Enriched Air Nitrox (EANx), oxygen exposure limits, and gas management. To complete the course, you’ll typically take a written exam to demonstrate your understanding of nitrox diving principles. Additionally, you’ll plan and execute two open water dives using Nitrox under instructor supervision. These dives assess your ability to analyze gas mixes, set your dive computer correctly, and dive within oxygen exposure limits. Most centres provide all necessary equipment and training materials. Once complete, you’ll earn a certification that permits you to dive with Nitrox mixes up to 40% oxygen—great for reducing nitrogen absorption and extending bottom time on repetitive dives.
Quick answers about this qualification. For anything else, use live chat or browse bookable activities below.
Find activitiesNitrox, or Enriched Air Nitrox (EANx), is a breathing gas with a higher percentage of oxygen (typically 32–40%) than regular air. Divers use Nitrox to reduce nitrogen absorption, which can allow for longer bottom times and shorter surface intervals—especially useful on multi-dive days. However, it comes with added responsibilities, including managing oxygen exposure and verifying gas mixes before each dive.
Yes. PSAI (Professional Scuba Association International) is a globally recognised training agency. The Nitrox Diver certification is accepted by dive centres and liveaboards around the world. Once certified, you'll be able to rent Nitrox tanks and dive with enriched air up to 40% oxygen—just be sure to bring your certification card or digital proof.
Most recreational divers don’t need to buy extra equipment for Nitrox diving. Standard scuba gear like regulators and BCDs are generally compatible with Nitrox up to 40% oxygen. You will, however, need access to an oxygen analyser to check your gas mix before each dive—a skill you'll learn during the course. Dive computers must also be Nitrox-compatible, which many modern models are.
To enrol in the PSAI Nitrox Diver course, you must hold an entry-level open water certification from PSAI or another recognised agency (such as PADI, SSI, or BSAC). You should also be in good health for diving and comfortable with basic scuba skills. The course is often taken in conjunction with advanced or specialty training, but it can also stand alone.
The PSAI Nitrox Diver course typically takes one day, including both theory and practical components. Some centres offer the theory via e-learning in advance, allowing you to complete the course more quickly on-site. The two Nitrox dives can be done in a single day if conditions allow. Check with your chosen centre as schedules may vary.
Yes, a written or digital exam is required to pass the PSAI Nitrox Diver course. The exam tests your understanding of oxygen exposure limits, equivalent air depths, and gas analysis procedures. Your instructor will ensure you're fully prepared before sitting the exam, and you’ll have opportunities to ask questions throughout the course.
Some agencies offer a 'dry' Nitrox certification that covers theory only, but PSAI requires two open water dives to complete the Nitrox Diver course. These dives reinforce essential safety practices like gas analysis and computer programming. Completing the dives also makes your certification more robust and widely accepted.
When using Nitrox, the main safety concern is oxygen toxicity, which can occur if you exceed the maximum operating depth (MOD) for your gas mix. You'll learn how to calculate MODs and plan dives to stay within safe oxygen exposure limits. Analysing your gas before every dive and setting your dive computer accurately are critical safety steps.
You can book the PSAI Nitrox Diver course directly through adventuro’s extensive diving pages, where we list verified training centres across the UK and beyond. Each centre provides details on schedules, pricing, and equipment options—making it easy to find a course that fits your plans.