A diver (Tony Youseman) on one of the quadruple propellersRebreather training in Malta.Santi drysuit and heating system on sale here,Rebreather diver in the red seaTDI Mixed Gas Course

Advanced Gas Blender

Advanced Gas Blender

Are you ready to progress on as a Gas Blender?

The TDI Advanced Gas Blender course picks up where you left off in the previous sequence in training, the TDI Nitrox Gas Blender course.

After successful completion of the TDI Advanced Gas Blender course, you will be able to engage in the blending of oxygen and helium based gases. The objective of this course is to train candidates in the proper procedures needed for the preparation and blending of high quality nitrox and trimix gases for use in technical diving. The TDI Advanced Gas Blender course will take you through this process in an easy-to-understand format.

Who this course is for: Whether you’re a dive shop employee wanting to learn the proper procedures for advanced gas blending or a diver interested in the process of advanced level blending, this course will give you an in-depth, behind the scenes perspective on how your cylinder goes from empty to full of nitrox or trimix gases.

Course prerequisites (these requirements must be met prior to commencement of training):

Minimum age 18

Provide proof of certification as a TDI Nitrox Gas Blender or equivalent

What you can expect to learn:

The TDI Advanced Gas Blender course takes an in-depth look at all of the following and more!

The Responsibility of the Gas Blender

Gases of diving




Oxygen handling

Oxygen hazards

Causes and prevention of oxygen fire

Oxygen system design

Local regulations for gas blending and handling

Gas production equipment



Filtration systems

Analog gauges

Mixing techniques

General considerations

Continuous blending systems

De-nitrogenated air systems

Pre-mix system

Partial pressure blending mathematics

Oxygen analysis


Oxygen analyzers

Cylinder handling and sign out

What’s in it for you?

Upon successful completion of this course, graduates may engage in the blending of nitrox gases, without direct supervision of an Instructor.

TDI Advanced Nitrox Gas Blender minimum certification requirements:

Satisfactorily complete the TDI Advanced Gas Blender course written examination with an 80% passing grade, followed by 100% remediation by the Instructor

Candidates must successfully blend, and analyze, 5 nitrox cylinders and 3 trimix cylinders

Demonstrate proficiency in blending, and analysis, of nitrox and trimix gases

International Association of Rebreather Trainers International Association Nitrox and Technical Diver Padi Tec Rec Technical Diving International