Ratio

Ratio iX3M2 Deep

A normoxic trimix computer with 3-transmitter wireless air integration.

Open BLE sync (libdivecomputer)

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

Ratio iX3M2 Deep
$799
Released2022
Max depth rating220m
AlgorithmBühlmann ZHL-12, ZHL-16B, ZHL-16C, or VPM-B (user selectable)
Air integrationwireless
Wireless—
DisplayColor IPS, QVGA, 150° viewing angle
Batteryrechargeable
Digital compassYes
Gas typesair, nitrox, trimix
Gas switches3
CCR capableNo

"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
  • Wireless air integration for up to 3 transmitters
  • Choice of 4 decompression algorithms
  • Built-in 3D compass
Cons
  • Capped at normoxic trimix and 3 gas mixes, the Tech+ offers more gases and CCR
  • Smaller support network in North America than the major dive-computer brands
  • Console-style unit, bulkier than watch-style competitors

The iX3M2 Deep sits below the Tech+ in Ratio’s lineup, trading full trimix and CCR capability for a lower price while keeping the same color IPS display, algorithm choice, and 3-transmitter wireless air integration.