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Nitrox Gas Blending in worldwide: 106 dive centres on TecDiveTools, with agencies, courses taught and a summary of what students say. 32 publish course prices.
TecDiveTools lists 106 dive centres teaching Nitrox Gas Blending worldwide. 32 of them publish course prices, in the currency the shop advertises and with the date each was checked — not converted, and not estimated.
Listings are ordered by how much evidence exists about their technical diving, not by a star rating, with any paid Featured listing shown first and marked as such (how rankings work). 78 of these 106 carry reviews we have read and classified as being about technical or overhead training. The count excludes recreational certifications by name, so a busy resort does not outrank a one-instructor cave operation on the volume of its reef trips. Separately, 63 have at least one instructor whose reviews we have read and summarised — a dive centre carries no synthesis of its own. How we read and count reviews.
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About the course
Foundational gas-blending course for safely mixing nitrox (up to 40% oxygen) using partial-pressure blending methods. Surface/classroom-based technical skills course (not in-water diving certification) for shop staff, fill-station operators, or divers who want to blend their own nitrox independently. Teaches oxygen-handling safety procedures critical when working with enriched air under pressure. Entry point into TDI's blending track; passing this is prerequisite for Advanced Gas Blending (trimix and custom mixtures). No dive certification prerequisite required since it addresses gas handling rather than diving.
Candidates must demonstrate proper partial-pressure blending calculations, accurate gas analysis techniques, oxygen safety protocols, tank preparation and labeling, and safe storage/handling of nitrox cylinders. Knowledge of regulations governing high-pressure oxygen and enriched-air handling.
106 dive centres on TecDiveTools teach TDI Nitrox Gas Blending worldwide: United States (31), Mexico (17), Philippines (15), Egypt (14), Malta (11) and Thailand (10), and 1 more. Each is listed above.
Published prices for TDI Nitrox Gas Blending worldwide range across 5 centres in the TecDiveTools directory — roughly US$160 to US$300 at current exchange rates. In each centre's own currency: €150–€250 (3 centres), ₱18,000 (1 centre) and THB 10,000 (1 centre). Prices differ mainly in what they include, so compare the inclusions before comparing the numbers. Prices were last checked in September 2026.
Between 1 and 2 days, based on the durations 2 centres publish for it worldwide. The time depends on the centre's schedule, weather, and how quickly the required skills are demonstrated — agencies set a minimum number of dives, not a fixed number of days.
At the same tier in TecDiveTools' cross-agency comparison, dive centres worldwide also teach IANTD EANx Gas Blender (16), PADI TecRec Tec Gas Blender (3) and RAID Gas Blender (1). They are comparable rather than interchangeable — each agency sets its own standards and card, so check which one your next course accepts.
