TUSA Zen Air / Nitrox Computer Watch IQ-900 009241

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Mfg Part #: IQ-900

Air & Nitrox Compatible

  • The most up to date firmware updates including the brand new revision 1D
  • 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
  • 24 Dive log 
  • 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 (not included - see below to order)
  • Diver-replaceable batteries
  • User changeable Imperial/Metric
  • TUSA Algorithm based on Buhlmann ZHL-16c
  • Variable Ascent Rate Indicator
  • COLORS: Black with Silver accents 
  • FULL MANUFACTURER’S WARRANTY

Customer Reviews for TUSA Zen Air / Nitrox Computer Watch:

See the top 20 most helpful scuba gear reviews

Average Customer Review: based on 6 reviews.

Rating: TUSA Zena Air DIve Computer
Reviewer: Arijit D.
An excellent product. Got much more than what was advertised. The deep stop and safety stop features are really great. The audible alarms and back light are very helpful. Must have for entry level - intermediate level divers. The pricing is fantastic, great value for money.

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20 out of 34 people found this review helpful.

Rating: Need a back-up
Reviewer: Peter Z.
I purchased one of these for myself and use it mainly as a back-up, this purchase is for my wife so she now has a back-up. We use the Wisdom 3 as our primary dive computer but we had one fail during a trip Hawaii. I carry an analog depth gauge with pressure gauge just in case. The Zen allowed me to continue diving with Nitrox. The Zen is easy to use and doubles as a time of day watch plus the display has large numbers.

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34 out of 66 people found this review helpful.

Rating: TUSA Zen Air IQ-900
Reviewer: Martin D.
The most advantage of this dive watch is that user can change the battery on his own. The digits are big enough compared to the watch size to be easily seen even in the Black See deeps. The free dive mode is excellent. Disadvantage of the free dive mode is that the history can only be viewed using the data cable.

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21 out of 37 people found this review helpful.

Rating: TUSA Zen IQ-900
Reviewer: Tanya I.  -  View all my reviews
I recently used this computer for my dives. It works perfectly! The computer is not too big and convenient to wear, it has large clear screen and shows all the necessary info easy to read. It goes with all the necessary presets including water activation, but I cant say its very easy to change settings: I had to read a lengthy instruction. Overall, I really enjoy it and I would recommend it to a friend.

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44 out of 95 people found this review helpful.

Rating: great dive computer
Reviewer: Cesar A.  -  View all my reviews
i bought 2 of this for a diving trip one for my wife and one for me, it is easy to use once you understand what you are doing (read the manual and take the online course first) it guides you to safety with the audible alarms. i used it with the conservatism level on and still have great dives. absolutely recommended.

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54 out of 112 people found this review helpful.

Rating: The utility, worthy of recommendation
Reviewer: Sally Zhang
The utility, worthy of recommendation

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11 out of 22 people found this review helpful.

Questions and Answers for TUSA Zen Air / Nitrox Computer Watch:


  • Dan:

    How many dives can be stored on the internal dive log? What are the overall size dimensions of this computer? Thanks.

    Darrick  (Certified Scuba Instructor at Scuba.com):

    Hello Dan, the dimension are like a regular wrist watch size, and the watch will hold 24 dives. If you would like to place an order or have any other questions please feel free to give us a call at 1.800.347.2822

  • ZB:

    i searched "iq-900" in scuba.com but there was two result. 1.tusa iq-900 zen air/nitrox computer dive watch 创like brand new创 2.tusa zen air / nitrox computer dive watch whats the different? which one is available? thanks!

    Bob  (Certified Scuba Instructor at Scuba.com):

    Items listed on Scuba.com as "like New" have been used as showroom demonstration items and have never been on a dive or into the water. They may or may not come with the original packaging but will have the user's manuals and documentation. The items no longer carry the manufacturers warranty but are warranted by Scuba.com.

  • Tony:

    RE: TUSA IQ-900 Zen Tell me about the strap, how does it go from your bare arm to over a 7mm wet suit?

    Clarke  (Certified Scuba Instructor at Scuba.com):

    Hello Tony, Thank you for your inquiry! The TUSA Zen Air / Nitrox Computer Dive Watch band will work with a wet suit and dry suits wrist thickness. http://www.scuba.com/scuba-gear-17/009241/TUSA-Zen-Air---Nitrox-Computer-Dive-Watch.html If you would like to place an order or have questions about our products, please contact one of our certified Dive Instructors at SCUBA.com by calling 800-247-2822 <> 949-221-9300 or e-mail us at: info@scuba.com

  • Elena:

    Is this the IQ-900 model? How fast will be the the shipment (I need it by August 17)?

    Bill  (Certified Scuba Instructor at Scuba.com):

    Standard ground orders are delivered within 2 weeks from the time they process.

  • Elena:

    On photo, it looks like iq-900 model. Is it IQ-900 indeed? Because the description doesnt say anything about this, it gives only series not the exact model.

    Bill  (Certified Scuba Instructor at Scuba.com):

    The part number is listed under the picture and is the IQ900.

  • Gonzalo:

    Is this compatible with Mac computers?

    Darrick  (Certified Scuba Instructor at Scuba.com):

    Hello Gonzalo, yes this computer is both MAC and PC friendly. You will need to go to the manufacture website to download the MAC software to up-date it. If you would like to place an order or have any other questions please feel free to give us a call at 1.800.347.2822.

  • Ryan:

    Is this computer interchangeable from imperial to metric?

    Darrick  (Certified Scuba Instructor at Scuba.com):

    Hello Ryan, yes you can switch this to either imperial or metric by a push of a button. If you would like to place an order or have any other questions please feel free to give us a call at 1.800.347.2822.

  • KF:

    How much is the tax for shipping to Singapore?

    Bob  (Certified Scuba Instructor at Scuba.com):

    The best method of calculating rates would be to enter the order using our online shopping cart and use the Amazon Checkout method of checking out. Amazon will verify all billing and shipping information and display your shipping costs. Be advised these costs do not reflect any additional Duty or Tax imposed by your country due to importation of the equipment. Any extra fees over those displayed are the responsibility of the customer.

  • KF:

    TUSA Zen Air / Nitrox Computer Dive Watch I really like the black color with chrome ring. Is the 360 degree view in scuba.com website a stealth black color with chrome ring? Thanks

    Bill  (Certified Scuba Instructor at Scuba.com):

    Black and silver.

  • Sally:

    Hello, excuse me, Tusa IQ900 on this computer, I do not buy the kit, you can connect the computer to upload data? I bought this computer can send together with our last shipment?

    Bob  (Certified Scuba Instructor at Scuba.com):

    For information regarding specific orders please contact our instructors at 800-34SCUBA or info@scuba.com

  • Андрей:

    Здравствуйте не могу заказать данный компьютер.Не поможете? Пишется предупреждение что не может меньше 250$ отправить в Россию, я делал на 300$ заказ все равно ничего не получается.

    Bill  (Certified Scuba Instructor at Scuba.com):

    Çàêàçû Ãðóçîïåðåâîçêè ïî Ðîññèè Íå ìîæåò áûòü áîëåå $ 250 Áîëåå $ 250 áóäåò îñòàíîâëåí íà òàìîæíå

  • Андрей:

    Добрый день! Хочу заказать tusa zen air, не могу зарегестрироваться и оплатить. Подскажите как это все сделать?

    Darrick  (Certified Scuba Instructor at Scuba.com):

    Hello, you would need to add all of the items you would like to buy. Once those items are in your cart you are going to hit the checkout button using Amazon checkout. Once on the Amazon checkout page enter all of your billing and shipping information and hit the recalculate button. That will calculate all of your shipping and duties to your location. If you accept and shipping and duties to your location then you can enter your payment method and your order will be processed. If you have any other questions please feel free to give us a call at 1.800.347.2822.

  • MT:

    The download cable says that it only works with XP and older OS. Is that correct? Will it not work with Win7? Thanks

    Bill  (Certified Scuba Instructor at Scuba.com):

    That is our understanding, you might want to contact TUSA directly to see if they have a solution.

  • bryant:

    hi, is this product currently available in stock ? thankz

    Bill  (Certified Scuba Instructor at Scuba.com):

    For current stock or availability contact info@scuba.com or 800-347-2822

  • EVGENIYA:

    Hello! Need advice. What to choose? This or Mares Nemo Matrix Air ? Thank you

    Darrick  (Certified Scuba Instructor at Scuba.com):

    Hello EVGENIYA, if the price is not the issue then I would suggest the Mares Nemo Matrix. It is just a better computer while more features that scuba diver's are looking for.

IQ-900 - TUSA Zen

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.

FEATURES
> 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

TECHNOLOGY

Backlit Display
Several TUSA computer instruments feature a backlit display for night diving or low-light situations. The bright backlight is activated by a touch of a button and the duration can be set for up to 10 seconds in length enabling the diver to view critical dive data easily and quickly.

User Replaceable Battery
Convenience and ease-of-maintenance is imperative in the design of today’s dive computer. Each of TUSA’s computers offer a user-friendly replaceable battery that can be changed on a moment’s notice using standard widely-distributed batteries.

PC Downloadable
TUSA’s PCLogbook and TUSA DataLog PC interfaces allow the diver to transfer complete log and profile history from the dive computer to a personal computer or upload user settings to the computer. A PC interface unit is sold separately.

2 Gas Mix
This feature allows the diver to preset two Nitrox gas mixtures (Mix 1 and Mix 2) for easy switching during the dive as necessary. Mix 1: 21 to 50%, Mix 2: 21 to 99%.

Audible Alarm
TUSA’s computers feature audible and visual alarms for the most important dive data warnings. Ascent rate, maximum depth, no decompression limits, safety stop and several other key data can be set to alert the diver.

Service and Repair (Instruments)
Q: Who can service my dive instrument?
Your TUSA authorized retailer can conduct a basic service on your computer such as battery change or strap replacement. For other service or warranty issues, please contact info@tusa.com or 800-521-8872 or the TUSA Agent/Distributor in your region.

Q: Where can I find available Firmware Updates?
Available firmware updates for IQ instruments can be found under the Support section and Firmware Updates page on the TUSA.com website.

Q: Where can I find PC Download Software Programs?
Available PC download software programs for IQ instruments can be found on the TUSA.com website.

Q: Is Mac Download Software Available?
Unfortunately, not at this time. PC software programs are only supported. A 3rd party vendor offers a logbook software program for the IQ-750/900/950, visit Mac-Dive.com.

Q: Can I change the battery on my dive instrument?
All current IQ series instruments have user changeable batteries. TUSA approved battery kits are available through your local authorized retailer.

Q: How Do I Erase the History Log or Dive Log on my instrument?
The unit would need to be sent to TUSA for a factory reset, please contact info@tusa.com or 800-521-8872 or the TUSA Agent/Distributor in your region.

Q: Do you have a Trade-In or Upgrade Program for older dive instruments?
No. There are no trade-in or upgrade programs available at this time.

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