What is the difference between the Nitrox and Trimix options?

The Nitrox Gas Blender course covers oxygen-enriched air blending using partial pressure and continuous flow methods. The Trimix Gas Blender upgrade adds helium-based gas blending, used in technical diving beyond 40m. You can complete Nitrox Blender as a standalone course, or continue directly to Trimix Blender with a separate fee and eLearning.

Does the course include open water dives?

No. The Gas Blender course is entirely academic and practical skills-based. There are no open water dives. Sessions cover theory, gas physics, oxygen safety procedures, and hands-on blending practice using cylinders and mixing equipment.

What does the SSI eLearning cover?

The SSI eLearning licence (€94) gives access to the digital Gas Blender study materials via the SSI app or web platform. It covers gas physics, oxygen toxicity, partial pressure calculations, blending ratios, equipment compatibility, and safe handling procedures. You complete it at your own pace before the practical session.

Technical Support · Gas Blending · ISO 13293

Mix Gas with Precision.
Blend Nitrox and Trimix to Standard.

Name: SSI Gas Blender
Availability: InStock
Rating: 4.8 (517 reviews)

The SSI Gas Blender course gives you the knowledge and hands-on skills to produce enriched air nitrox safely using partial pressure and continuous flow methods. Continue to the Trimix Gas Blender upgrade and add helium-based gas blending to your skill set. Academic and practical sessions only. No open water dives required.

Enquire Now View Syllabus

Certified by SSI

Course Fees

Nitrox Gas Blender

^€190+^€94SSI eLearning

Total: €284

Trimix Gas Blender upgrade

^€285+^€94SSI eLearning

Total: €379

✓SSI eLearning licence per course

✓Full practical blending session

✓O2 analysis and documentation

✓Nitrox + Trimix completable same day

✓SSI certification on completion

Reserve Your Place

Questions? WhatsApp us first

Course Overview

The gas that goes into your cylinder matters as much as the gear on your back.

Technical divers rely on precisely blended gas mixtures for every dive. A cylinder filled to the wrong enriched air percentage is not a minor inconvenience, it is a safety issue. The SSI Gas Blender course (ISO 13293) teaches you to produce reliable, analysed, and documented gas mixes yourself, using industry-standard partial pressure and continuous flow techniques.

The Trimix Gas Blender upgrade extends this to helium-based blends, covering the calculations and procedures required to produce bottom and deco gases for technical dives beyond 40m. Both courses are academic and practical, completed in 6 to 8 hours each. There are no open water sessions and no diving certification is required to enrol.

Understand gas physics, partial pressure laws, and oxygen toxicity limits
Blend enriched air nitrox using partial pressure blending
Blend enriched air nitrox using continuous flow blending
Analyse finished blends accurately and document results
Identify and maintain oxygen-compatible equipment
Blend trimix (helium + nitrox) for technical dives (Trimix upgrade)
Calculate and produce bottom gas and decompression gas mixes (Trimix upgrade)

SSI Gas Blender

diveshack Malta, SSI Diamond ITC

Level Technical Support

Certification SSI Gas Blender

Valid Worldwide, lifetime

Standard ISO 13293

Min Age 18

Prerequisite Min age 18 only

Open Water Dives None

Upgrade Trimix Gas Blender available

Trimix Gas Blender Upgrade

Extends your certification to helium-based gas mixing. Prerequisite is the SSI Gas Blender (Nitrox) cert. Can be completed immediately after, or as a standalone enrolment if you already hold the Nitrox Blender cert. €285 course + €94 eLearning.

What You Will Cover

One day. Complete gas blending competency.

The SSI Gas Blender (ISO 13293) program combines academic sessions with practical application sessions. Nitrox Gas Blender covers academic sessions 1–5 plus practical sessions 1 and 2. Trimix Gas Blender requires all academic sessions plus practical sessions 1 through 4. No diving certification required to enrol. Minimum age 18.

Academic Theory

Gas Physics and Oxygen Safety

Dalton's Law, partial pressure calculations
Oxygen toxicity: CNS and pulmonary limits
Enriched air fractions and maximum operating depths
Contaminant risks and cylinder preparation standards
Documentation requirements: blend records and analysis logs

Practical Session: Nitrox

Nitrox Blending Techniques

Partial pressure blending: oxygen first, fill to pressure
Continuous flow blending: membrane and booster systems
Oxygen-compatible equipment: cleaning, handling, valves
Using an oxygen analyser: calibration, technique, accuracy
Completed blend documentation and labelling

Optional Upgrade

Practical Session: Trimix

Trimix Gas Blending

Helium properties and behaviour in gas mixing
Calculating bottom gas and deco gas ratios for tec dives
Partial pressure blending with three components: O2, He, N2
Confirming blend accuracy for hypoxic and normoxic trimix
SSI Trimix Gas Blender certification on completion

Throughout

Safety Procedures and Standards

O2 flash-point and fire risk: workspace controls
Cylinder inspection before and after blending
Blend request forms, fill logs, and sign-off procedures
Blender responsibilities and legal liability overview
When to refuse a fill: contamination and equipment failure

Pricing

Choose your option

Take the Nitrox Gas Blender as a standalone course, or enrol for both Nitrox and Trimix in sequence on the same day.

Common questions

No diving certification is required. The only prerequisite listed in the SSI Gas Blender standard (ISO 13293) is minimum age 18. The course is open to anyone who meets the age requirement and has access to the required blending equipment during training. The Trimix Gas Blender upgrade does require the Nitrox Gas Blender certification first.

The Nitrox Gas Blender course covers oxygen-enriched air blending using partial pressure and continuous flow methods. You learn to produce, analyse, and document enriched air fills from 21% to 40% oxygen. The Trimix Gas Blender upgrade adds helium-based gas mixing, used in technical diving beyond 40m. It covers calculating and producing bottom gas and decompression gas mixes containing helium, nitrox, and oxygen. The two courses can be completed on the same day in sequence.

No. Both the Nitrox Gas Blender and Trimix Gas Blender courses are entirely academic and practical skills-based. There are no open water dive sessions. The course covers theory, gas physics, oxygen safety procedures, and hands-on blending practice using cylinders and mixing equipment in a controlled workshop setting.

The SSI eLearning licence (€94 per course) gives access to the full digital Gas Blender study materials via the SSI app or web platform. It covers gas physics, Dalton's Law, oxygen toxicity limits, partial pressure calculations, blending ratios, equipment compatibility, and safe handling and documentation procedures. You complete it at your own pace before attending the practical session.

The SSI Gas Blender certification qualifies you to blend gases for yourself and for other certified divers within the SSI standards you have been trained to. Any commercial supply of diving gases is subject to applicable local and national regulations and may require additional permits or qualifications. If you intend to blend commercially or for a dive centre, check the specific requirements in your jurisdiction before doing so.

All cancellations must be submitted in writing to info@divemalta.com. 14 or more days notice: full refund. 6 to 13 days notice: 50% refund. 5 days or fewer: no refund. SSI eLearning fees are non-refundable once accessed. If diveshack cancels due to circumstances outside our control, you receive a full reschedule or full refund. Full terms at divemalta.com/terms.

Enrol

Book Gas Blender

Locationdiveshack, Sliema, Malta

Duration6–8 hours, no dives

Group SizeMax 5 per instructor

Nitrox from€190 course + €94 eLearning

Trimix from€285 course + €94 eLearning

Deposit50% to book your place

WhatsApp Us

Book or enquire

Ready to start?

Fill in the form and we will confirm availability, answer questions about which option suits your programme, and send everything you need before your course day.

Usually within a few hours. We confirm your dates, answer questions, and send full joining instructions.

Prefer to talk first?
+356 9999 3483 · WhatsApp

Enquiring about

First name * Please enter your first name.

Last name * Please enter your last name.

Email * Please enter a valid email address.

Phone / WhatsApp

Preferred start date * Please select a start date.

Preferred end date End date must be after start date.

Number of people * Please select number of people.

Course option

Message or questions

Enquiry sent

Thank you, . We will get back to you at within a few hours.

A copy has been sent to your inbox

Mix Gas with Precision.Blend Nitrox and Trimix to Standard.