TUSA Zen Air/Nitrox Wrist Style Computer (Free Online Class)

Other products by TUSA
SKU: 4293--
Reg. Price: $449.00
Our Price: $389.99

on orders of $25.00 or more.
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TUSA Zen Air/Nitrox Wrist-Top Computer (Free Online Class)

The IQ-900 Zen is a full-featured wrist-top computer that boasts a refined, stylish design and can be worn at the office, on the town or more importantly in the ocean. Anytime, anywhere the Zen is your go to timepiece and dive instrument.

The IQ-900 can be operated as a watch, Air computer, Nitrox (EANx) computer, digital depth gauge/timer or as a free dive depth gauge/timer. The Zen's large alphanumeric and backlit display allows for high legibility in or out of the water, although its size is that of a normal style watch. In addition to offering the latest comprehensive computer features, the Zen adds a Deep Stop function for enhanced safety.

Deep Stop Function
Several TUSA computers feature an optional deep stop function for additional safety. The deep stop mode is activated when a dive exceeds 80 FT (24M) for more than 1 second. Upon ascent, the computer will display a Deep Safety Stop screen and the recommended stop depth for a period of 2 minutes. This deep stop is highly recommended as additional opportunity to off-gas, but is not mandatory. If the diver chooses not to serve the stop it will not adversely affect the remaining No-Decompression Limits of the dive.


  • Advanced 2 gas wrist-top (watch) computer
  • Air, Nitrox, Gauge, Free Dive and Watch Operating Modes
  • 2 Mix Switching Feature: Mix 1 (Air, 21-50%), Mix 2 (Air, 21-100%)
  • Manual or Water-Activation
  • Audible and Flashing Icon Alarms
  • Large alphanumeric and backlit display
  • Advanced user safety settings
  • Deep Stop Feature and Safety Stop
  • 1 Touch Log Access
  • Automatic altitude adjustment from sea level to 14,000'
  • No fly icon, residual nitrogen discharge time display
  • PC download and upload settings/log data with TUSA Datalog Interface
  • User-replaceable battery with hot-swap (Battery: CR2430, 3V)
  • TUSA Algorithm based on Buhlmann ZHL-16c
  • Variable Ascent Rate Indicator
  • Colors: Titanium Grey/Black, Black
  • DOWNLOAD IQ-900 Product Manual or Quick Overview Card
  • DOWNLOAD TUSA Datalog Software
  • View the TUSA Instrument Comparison Chart
  • Take the IQ-900 Online Class and Learn More!


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Questions & Answers

Question asked
on 6/4/2012
i have large wrist, are over sized watch bands available, or perhaps another way to mount. ty
Answer by Bill
on 6/8/2012
Hey There, these come with oversized straps for wearing over a wetsuit so should be fine for you

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