TDI Advanced Gas Blender
Understand the systems behind every fill, manage oxygen safely, and take control of gas production
Overview
The TDI Advanced Gas Blender course builds on the Nitrox Gas Blender program and expands your capability into helium-based gas blending, including trimix.
This course focuses on the safe preparation of both nitrox and trimix gases, introducing more complex blending procedures, oxygen handling protocols, and system management. Divers and professionals develop a deeper operational understanding of how technical breathing gases are produced, analyzed, and controlled. 
At N9BO℠, this course is positioned as a critical operational skill — moving from basic gas handling into full technical gas production with precision and accountability.
Course Facts
- Course name: TDI Advanced Gas Blender
- Level: Technical support / gas blending course
- Minimum prerequisites: Minimum age 18, TDI Nitrox Gas Blender or equivalent
- Ratio: Academic only – no fixed limit, based on facility and instructor capacity (small groups recommended for quality training)
- Configuration: Gas blending systems including compressors, oxygen and helium supply, cylinders, and analysers
- Depth / environment: Not applicable (non-diving course)
- Format: Academic development + practical gas blending workshop
- Duration: 1 day with hands-on blending and analysis (no dives required)
What You’ll Learn
- Blend both nitrox and trimix gases safely and accurately.
- Understand helium properties and its role in technical diving.
- Apply advanced mixing techniques including partial pressure and continuous blending.
- Manage oxygen and helium hazards and system requirements.
- Analyze gas mixtures and verify composition.
Prerequisites
- Be at least 18 years old.
- Hold a TDI Nitrox Gas Blender certification or equivalent.
- Be medically fit to participate in training activities.
FAQ
This course is for divers, technicians, and dive professionals who want to expand from nitrox blending into full mixed gas production, including trimix.
The Nitrox Blender course focuses on oxygen-enriched air, while Advanced Gas Blender introduces helium and trains you to produce trimix, significantly increasing complexity and precision requirements.
You will perform multiple gas blends, including both nitrox and trimix, and analyze each cylinder to verify accuracy while applying correct procedures and safety protocols.
You will be required to successfully blend and analyse a minimum of 5 nitrox cylinders and 3 trimix cylinders, demonstrating accurate gas composition and proper blending procedures to meet technical diving standards.
You will be qualified to blend both nitrox and trimix gases independently, within the limits of your training and local regulations.
Ready to Take Full Control of Your Gas?
Send us your background and operational goals. We’ll train you to produce high-quality nitrox and trimix safely, accurately, and consistently.
Go Pro with TDI Advanced Gas Blender Instructor
Take your gas blending expertise to the professional level and start teaching advanced gas production. Delivered by a TDI Instructor Trainer, this pathway builds the precision and instructional ability required to train others in safe nitrox and trimix blending.
