Draft entry. Specs not yet verified against the manufacturer.

McLean

McLean Extreme

A boutique, hand-built technical computer machined from solid Delrin with a fully custom display.

Open BLE sync (libdivecomputer)

Syncs wirelessly with third-party apps (Subsurface, Currents, etc.), not just the manufacturer app.

McLean Extreme
Released—
Max depth rating—
AlgorithmBühlmann ZH-L16 with gradient factors
Air integrationnone
Wireless—
Display—
Batteryuser-replaceable
Digital compassYes
Gas typesair, nitrox, trimix
Gas switches8
CCR capableYes

"Gas switches" is how many different mixes this computer can be programmed to switch between mid-dive, mostly relevant for technical/staged-decompression diving. It doesn't tell you which gas types (air, nitrox, trimix) are supported. See Gas types and the product description above for that.

Pros
  • Machined from a solid block of Delrin with a 5mm Lexan window and gold-plated stainless fittings, built to last
  • Runs on a standard field-replaceable AA battery
  • Up to 8 configurable diluent or open-circuit gases, fully customizable display layout
Cons
  • Could not confirm a manufacturer max depth rating or current pricing, the manufacturer's site was unreachable during research and it isn't carried by major retailers
  • Boutique, hand-built computer with a small production run; some ScubaBoard users report build-quality and reliability issues
  • Niche brand with limited dive-shop availability outside Europe

The McLean Extreme is a boutique technical computer built around a solid Delrin case and an ARM-based custom circuit board, popular in cave and CCR circles for its rugged construction and fully configurable display, though it’s a much smaller operation than mainstream dive-computer brands.