A technical diver handling decompression stage cylinders during a dive

Photo by Teemu Virtanen · CC BY-SA 3.0

OC TechPSAI

Extended Range Nitrox

Last updated September 21, 2026

What it costs

No centre in the directory publishes a price for this exact certification yet. What follows is what the same training costs elsewhere.

Same training under a different agency

29 centres

A separate set of centres, teaching Extended Range under a different agency. These are not the same certification — the standards and the card differ — but they cover the same depth and scope, which is why centres price them alike. Every row here names whose rating it is, and none of them is counted above.

€500 – €850across 13 centres pricing in Eurofrom ≈ $561

Charged by the day or dive rather than as a course price:

IDR 10,000,000 – IDR 20,700,000across 10 centres pricing in Indonesian Rupiahfrom ≈ $557
  • Bali Dive TrekIndonesia
    SSI Technical Extended RangeSSI XR
    IDR 20,700,000
    total
  • Sulawesi Dive TrekIndonesia
    Technical DiverIANTD
    IDR 15,000,000
    total
  • Bali Dive TrekIndonesia
    RAID Deco 50 DiverRAID
    IDR 17,500,000
    total
  • Gili DiversIndonesia
    Advanced Decompression Diver (50m)RAID
    IDR 10,000,000
    total
  • Gili DiversIndonesia
    Extended Decompression Diver (55m)RAID
    IDR 15,000,000
    total
  • Bali Dive TrekIndonesia
    TDI Extended RangeTDI
    IDR 20,700,000
    total
  • Bali Dive TrekIndonesia
    IANTD Technical DiverIANTD
    IDR 17,500,000
    total
  • Blue Marlin TechIndonesia
    Extended RangeTDI
    IDR 15,000,000
    total
  • Manta DiveIndonesia
    TDI Extended RangeTDI
    IDR 12,500,000
    total
  • Trawangan DiveIndonesia
    TDI Extended Range DiverTDI
    IDR 12,600,000
    total
$950 – $1,400across 3 centres pricing in US Dollar

Charged by the day or dive rather than as a course price:

  • Cave AdventurersUnited States
    Extended RangeTDI
    Private class$450/day→ $1,350 for the 3-day minimum
    Group class$350/day→ $1,050 for the 3-day minimum each
    $450
    per day
  • Horizon DiversUnited States
    PADI Tec 50 DiverPADI TecRec
    $1,000
    per person
  • Divers UnderGroundMexico
    TDI Extended RangeTDI
    $325/day
    $325
    per day
  • Under The JungleMexico
    Extended RangeTDI
    private$345/day→ $1,380 for the 4-day minimum
    per diver in a group$295/day→ $1,180 for the 4-day minimum each
    $345
    per day
THB 25,000 – THB 44,900across 6 centres pricing in Thai Bahtfrom ≈ $746
₱32,950 – ₱54,000across 2 centres pricing in Philippine Pesofrom ≈ $522
  • Tech AsiaPhilippines
    TDI Extended RangeTDI
    ₱54,000
    total
  • Tech AsiaPhilippines
    PADI Tec 50PADI TecRec
    ₱32,950
    total
One centre publishes a price in Mexican Peso.

Same tier, agency not stated

12 centres

These centres publish a price for Extended Range, but their own wording does not say which agency's certification it buys — many teach several and name the card only once you enquire, and some price one course for either agency. The figure is comparable; the certification is not identified, so we do not guess at one.

THB 29,000 – THB 44,900across 5 centres pricing in Thai Bahtfrom ≈ $865
€650 – €900across 4 centres pricing in Eurofrom ≈ $729

Charged by the day or dive rather than as a course price:

  • Ritual DiveMalta
    SSI XR Technical Extended Range
    €200/day→ €1,000 for the 5-day minimum
    €200
    per day
One centre publishes a price in Indonesian Rupiah.
One centre publishes a price in US Dollar.
  • Horizon DiversUnited States
    Extended Range / Trimix (TDI or IANTD)
    $1,600
    total

These prices are not like-for-like. Two centres can charge very differently for the same certification because they include different things. One price may cover twinsets, stages, deco gas and cylinder rental for every training dive, a dedicated classroom for the theory, boat or transport to the site, and the agency's registration and materials; another may be tuition only, with all of that charged separately — or the other way round, with a centre bundling in extras the first leaves out. Class size, whether the course is one-to-one, and how many days are allowed for it move the figure too. Check what each centre's price includes before comparing them, and confirm with the centre before booking.

Consumables are usually extra. Sorb, helium, O₂ and other fills, park and cenote fees, certification fees and rental are commonly charged on top.

Packages combining several certifications, upgrades from an existing one, and open-ended day rates are excluded — none of them is the standalone price of this course, and including them would move the figures away from what a new student can actually book.

No instructors or dive centres found offering this course.

We're still building out the directory country by country, so this list isn't every instructor or dive centre teaching it in the world — more locations are coming soon.

Common questions about PSAI Extended Range Nitrox

What is the equivalent of PSAI Extended Range Nitrox in other agencies?

At the same tier in TecDiveTools' cross-agency comparison: RAID Advanced Decompression, RAID Extended Decompression, TDI Extended Range, PADI TecRec Tec 50 and IANTD Technical Diver. They cover comparable training, but each agency sets its own standards, depth limits and certification card, so they are comparable rather than interchangeable — check which one your next course accepts.

RAID Advanced DecompressionRAID Extended DecompressionTDI Extended RangePADI TecRec Tec 50IANTD Technical Diver

What course comes after PSAI Extended Range Nitrox?

The next step in PSAI's progression is PSAI Trimix Fundamentals.

PSAI Trimix Fundamentals
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