Nitrox Gas Blender Course in Koh Chang – Professional Gas Mixing Training
The Nitrox Gas Blender Course at Koh Chang taught by certified TDI and PADI Instructors takes you deep into the technical foundation of recreational and technical diving: safe, precise and professional nitrox gas blending.
This course is designed for divers, dive professionals and dive center staff who want to fully understand how nitrox is produced, analyzed and safely filled. You will learn exactly how an empty cylinder becomes a precisely blended nitrox mix – in compliance with international standards.
Who Should Take the Nitrox Gas Blender Course?
This course is ideal for:
- Dive center staff involved in filling and gas handling
- Instructors and Divemasters looking to expand their technical skills
- Certified nitrox divers interested in the science and practice of gas blending
- Divers planning to move toward advanced nitrox and technical diving
No marketing fluff – this is real-world, hands-on training using professional equipment in an operational dive center environment at Koh Chang.
Course Prerequisites
- Minimum age: 18 years
- Strong interest in diving operations, safety and gas management
What You Will Learn
The Nitrox Gas Blender Course provides in-depth theoretical and practical knowledge, including:
- Responsibilities and legal duties of a Nitrox Gas Blender
- Gases used in scuba diving: air, oxygen and nitrogen
- Oxygen handling procedures and oxygen fire prevention
- Oxygen system design and local regulations
- Gas production equipment: compressors, cylinders, filtration and gauges
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Mixing techniques:
- Partial pressure blending
- Continuous blending systems
- Pre-mix and de-nitrogenated air systems
- Oxygen analysis procedures and correct use of analyzers
- Cylinder labeling, documentation and fill logs
A strong focus is placed on understanding gas mathematics and safe operating limits, directly connected to real dive planning and gas consumption considerations.
Practical Training & Certification Requirements
During the course you will:
- Blend and analyze a minimum of 5 nitrox cylinders
- Achieve oxygen accuracy within ±1% of the target mix
- Complete proper nitrox fill logs including MOD and oxygen percentage
- Pass the Nitrox Gas Blender written examination
Upon successful completion, graduates are qualified to blend nitrox gases independently, without direct instructor supervision.
Why Take This Course at Chang Diving Center?
At Chang Diving Center, this course is taught by an active certified Nitrox Gas Blender Instructors using real-world equipment and operational procedures – not simulated classroom examples.
Located on Koh Chang, our facility offers a unique opportunity to learn gas blender certification in Thailand in a professional dive center environment with direct links to:
Whether you aim to work in a dive center, improve safety standards, or move into technical diving operations – the Nitrox Gas Blender Course at Koh Chang is a solid, professional step forward.
Professional training. Real responsibility. Real skills.
→ Read our Complete Nitrox Guide
Course Format & Requirements
- Agency: TDI or PADI Nitrox Gas Blender
- Prerequisite: Minimum age 18 years, interest in diving operations and gas management
- Duration: Typically 1 day (theory + hands-on blending)
- Outcome: Qualified to blend nitrox gases independently (without direct instructor supervision)
Not sure if this course is right for you? Nitrox Diver Course (diving with enriched air) is the recreational option; Advanced Nitrox is the next technical step.
What can you discover after your Gas Blender course?
Join our fun dives, dive with your own Nitrox blends and explore vibrant coral reefs, fascinating critters, and majestic marine life — including the legendary HTMS Chang Wreck.
Use our dive site map to plan your adventure or dive deeper into our Marine Life Guide and see what awaits below the surface.
What other divers discovered
Real reviews and experiences from our guests – see what others found on their diving adventures with us!
Ready to Blend Nitrox Professionally?
The Nitrox Gas Blender Course is the right step if you work in a dive center, want to understand gas mixing in depth, or are moving toward technical diving operations. Our certified TDI and PADI Instructors offer the course at 9,990 THB.
- ✅ Professional gas blending skills
- ✅ Oxygen handling and safety
- ✅ Complements Nitrox Diver and Advanced Nitrox training
Nitrox Gas Blender
💸 9,990 THB
Nitrox Gas Blender certification (TDI or PADI). Theory and hands-on blending at Chang Diving Koh Chang. View all course prices.
Questions? Contact us or book directly below.
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With Nitrox, you’ll extend your time exploring sites like the HTMS Chang, meet more marine life, and reduce surface intervals between dives. It’s a win-win.
Interactive blending calculators
These tools follow standard textbook assumptions: ideal gas, topping gas is air with 21% O₂, and all cylinder pressures are absolute bar (atmospheric + gauge if you work in gauge units—stay consistent with your training). Continuous-flow mode assumes the incoming mix blends uniformly with the gas already in the cylinder while you fill.
⚠️ Important: For education and classroom practice only. No warranty. Real fills require a certified blender, oxygen-clean equipment, an oxygen-compatible compressor and breathing-air supply suited to nitrox/O₂ use, correct procedures, and analyzer verification. Follow your agency manual—fill order and local rules may differ.
Hazards: Nitrox and oxygen blending involve fire and explosion risk. Getting it wrong can threaten lives and property. Blend nitrox only if you are certified as a gas blender (this course qualifies you to blend independently afterward). Always use all safety standards of the scuba diving industry and respect local laws—on every fill.
Partial pressure blending (O₂ first, then air)
Note: All equipment used must be oxygen-clean. The topping air must be oxygen-compatible.
Empty: pressure to reach with pure O₂ before topping with air to final pressure. Residual: pressure after the O₂ step before air top-off.
Continuous flow blending (inlet mix)
Required O₂ fraction in the continuous fill gas so that, after filling from the start state to final pressure, the cylinder matches the target mix (simple mixing model).
Real-world note: Continuous-flow panels often need a slightly higher O₂ setpoint than this ideal figure, because of plumbing, mixing path, fill rate, and where you sample. At our station, for example, landing on EAN32 typically means dialling in around 33.5% O₂ on the blender—not because the math is wrong, but because the installation behaves that way. Always analyse every cylinder and adjust your workflow to your system.
MOD (maximum operating depth)
Depth at which ambient pressure reaches your chosen maximum inspired O₂ partial pressure (freshwater / common metric approximation: 1 bar per 10 m).
