Hollis DG02 Air / Nitrox Computer 204.2358 009237


Video: Hollis DG02 Air/Nitrox Wrist Computer Video Review
Mfg Part #: 204.2358
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Air & Nitrox Compatible

  • Free Computer Gauge Guard included
  • Full Function Air/Nitrox Dive Computer
  • Visual Alarm (ascent)
  • Button or Water Activation
  • Audible alarms
  • Powerful backlight for night diving
  • Diver-replaceable batteries
  • Ascent rate indicator
  • Computer Downloadable (download kit not included - see below to order)
  • Nitrogen bar graph
  • Depth to 330 feet
  • Automatic Altitude Adjustable
  • 12 Dive log
  • Time-to-fly
  • Time of day (use it like a watch)
  • Imperial/Metric (user-setting)

Customer Reviews for Hollis DG02 Air / Nitrox Computer:

See the top 20 most helpful scuba gear reviews

Average Customer Review: based on 3 reviews.

Rating: Failed on second dive
Reviewer: Scott M.  -  View all my reviews
I purchased the DG02 because I liked the simplicity and ability to switch to gauge mode to use as a bottom timer. Dive 1 (80) was uneventful, however during the SI, the computer seemed to fall into some sort of demo mode. I had an air computer as backup and dove tables for my second dive with Eanx 32. At about 20 feet, the DG02 kicked back to dive mode, but then started to shut down as the readout became vague, eventually going blank. Although I completed the dive safely, the computer never turned on again. was prudent in refunding me once I sent the unit back.

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6 out of 14 people found this review helpful.

Rating: Great instrument for its price
Reviewer: David Patterson Attn:DP3579
I bought it for my trip to DR and made 6 dives with it. DG02 has a nice, readable display and delivers all info you need during your dive. The log is also handy and readable. The 2 weaknesses are backlight and audible alarms. The first, I found out is hard to switch on, the second is to low. Both issues came during fresh water cave dive. While ascending in a steep and narrow chimney, exhausted air made enough noise to obscure an alarm sound and I could not turn the backlight on time to see VARI. And these are the reasons why DG02 is 4.5* piece of technology.

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40 out of 77 people found this review helpful.

Rating: Great Value.
Reviewer: Stephen S.  -  View all my reviews
Works great! Easy to read and use. Does everything you need.

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128 out of 253 people found this review helpful.

Questions and Answers for Hollis DG02 Air / Nitrox Computer:

  • Thomas:

    I received the download cable/kit for the DG 02. Wondering if I need software or where do I find a log program?

    Clarke  (Certified Scuba Instructor at

    Hello Thomas, Thank you for your inquiry! To download the log book software for your Hollis DG02 Air / Nitrox Dive Computer, please use this link: If you have any questions or wish to place an order, please call us at 1-800-247-2822 or 949-221-9300.

  • Rod:

    Would like to know the diameter of this module. Thank you.

    Darrick  (Certified Scuba Instructor at

    Hello Rod, this is 2.5"


    Before i purchase the cable to download my previous dives. is it compatible with Macs?

    Arthur  (Certified Scuba Instructor at

    Hello, here is the number to Hollis they would be able to answer this for you (510) 729-5110

Digital Bottom Timer and Nitrox Computer
DG 02 can be used in two modes; Digital Bottom Timer or Nitrox Dive Computer with Hollis Z+ Algorithm

Overview Features Manual
Digital Bottom Timer or Nitrox Computer
400 fsw (120 msw) max operating depth
User replaceable battery
On/Off Audible Alarms with Flashing LED
Backlight for use in low visibility

2 operation modes Digital Bottom Timer or Nitrox Dive Computer
Hollis Z+ Algorithm based on Buhlmann ZHL-16c
Includes Deep Stops and standard Safety Stop feature
400 fsw /120 msw max operating depth as bottom timer
User replaceable battery
On/Off Audible Alarms
Backlight for use in low visibility
Manual or wet activation
Computer Downloadable
Altitude adjusting


View all Hollis Computers

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International 001.949.221.9300