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Aeris A100 Makes Our Diving Easy

Aeris A100 Makes Our Diving Easy

Dive computer Aeris A100 is a simplified version with Dual Algorithm and two dive modes - perfect as a backup device or entry level.

General Information
User Interface
Your Review



Dive computer Aeris A100 came with one control button, Dual Algorithm and two dive modes - looks like that's all we need to enjoy diving in full and not to dive too deep into the technical aspects! It can be recommended dive computer to other dive gear of the beginners in diving, and recreational divers with Nitrox certification who just want to go easy.

Aeris A100 is designed with CLEAR function. It can be a benefit for dive shops that give this Aeris dive computer for rent to students. But if you want to use this function yourself - do it with caution! Wait till you offgas completely, otherwise, you may be it trouble, if dive subsequently without full desaturation.

Aeris A100 Features card

Copy this Aeris A100 Features & Alarms Card for your Reference and Share with your friends and buddies!


Below is a list of new features that we can set up in this new Aeris dive computer:

  • Dual Algorithm - Pelagic DSAT & Z+;
  • Depth alarm - ON/OFF, 10 - 100 meters;
  • Elapsed Dive Time (EDT) alarm - ON/OFF, 10 - 180 minutes;
  • Dive Time Remaining (DTR) alarm - ON/OFF, 5 - 20 minutes;
  • Personal Conservative Factor - ON/OFF



Benefits of using Aeris A100 dive computer

  • you will learn this straightforward dive computer in no time and be ready for diving right away to depths down to 100 meters;
  • you will be able to dive with Air and Nitrox with minimal adjustments;
  • you may set Aeris A100 for liberal or conservative diving;
  • you will enjoy secure diving with its safety features and warnings;
  • you can definitely replace battery by yourself
  • you can choose between wrist and NAVCON versions
  • you can save great deal of money if you need dive computer with basic functions

Aeris A100 is very easy to learn, set up and use. We can build a console on the base of this Aeris dive computer by adding submersible pressure gauge and compass. As it has Dual Algorithm, someone may want to use it as a backup device for other Aeris or Oceanic and Tusa brands. Beginners and recreational divers who require straightforward dive computer for an easy set up and diving will definitely find reliable buddy in Aeris A100.







User Interface
1 button
Dive Modes
Air & Nitrox
Integrated Digital Compass
Dual: Pelagic DSAT & Z+
Number of Gas Mixes
Air, 21% - 50%
1.2 - 1.6 ATA
Air Integration
Safety Stop (SS)
Deep Stop (DS)
Conservative Factor
Altitude adjustment
Gas Switching
Dive Planner
9 - 57 meters
Logbook Capacity
12 most recent dives
Max Operational Depth
100 meters
Backlight duration
Sampling Rate
factory pre-set
User Replaceable Battery
Battery 'hot swap'
PC Interface
2 years











As many other basic dive computers, Aeris A100 has 1 control button for setting up and retrieving information. While on Surface Mode, by pressing button (<2 sec), you may observe 3 surface displays with variety of info, or go to adjustments.

Dive computer has 2 coloured bar graphs - TLBG (diver's nitrogen loading), which is located at the left side of display and VARI (variable ascent rate), which is located on the right side of the screen.

TLBG bar graph has 20 segments - 13 No-DECO conditions, 6 caution conditions, and the last top segment of TLBG represents DECO mode.
VARI bar graph - it's a visual indication of diver's ascent, and it will start flashing, if diver ascends faster than allowed.

The screen is large enough and easy to read. Aeris A100 designed with intuitive display layout with big and sharp digits, which are viewable at the any angle.







It's very easy to set up Aeris A100. Just 1 button does it all! As this is basic dive computer - there are not many parameters, as you may see for yourself. Someone may say that the menu is not very comfortable, as settings go one after another without possibility to step back. But that what we should expect from 1-button instrument. And there is nothing wrong with it!

Aeris A100 Settings card

Copy this Aeris A100 Fine-Tuning Card for your Reference and Share with your friends and buddies!


Dive computer has Dual Algorithm (DSAT/Z+) - it means that you may choose between liberal and conservative diving. By using Dive Planner, we may plan the next dive and scroll through the depths at range 9 - 57 meters. Dive computer shows allowable No-Deco depths and bottom times depending on diver's nitrogen loading and oxygen saturation from previous dives, and also set Personal Conservative Factor.







Aeris A100: Diving With Air & Nitrox

Aeris A100 displays Dive Time Remaining (DTR) by monitoring your current depth, oxygen accumulation, NO-DECO status. It shows you not only your DTR as a NO-DECO (NDC) Time remaining at certain depth in minutes, but also displays status of TLBG by adding or taking away segments of that bar graph.

When you dive with compressed air – you have 79% of nitrogen and 21% of oxygen approximately. If this is the case – your tissues absorb nitrogen and Dive Time Remaining (DTR) is shown according to nitrogen loading.

When you dive with enriched air - Nitrox – it is a different scenario. You have different percentage of nitrogen and oxygen and your body responds differently to such a gas mix. In this case you are exposed to oxygen toxicity.
When amount of time remaining before you reach O2 limits becomes less than No-Decompression (NDC) Time remaining at certain depth, calculations for that depth will be controlled by O2, and Aeris A100 dive computer shows Oxygen Time remaining (OTR) as Dive Time Remaining (DTR) on the NO-DECO ALT2 display.

Aeris A100 NO-DECO cardCopy this Aeris A100 NO-DECO Displays Card for your Reference and Share with your friends and buddies!

Dive computer has only two dive modes: Air and Nitrox with FO2 up to 50%. If you set Aeris A100 for Nitrox - dive computer will show NO-DECO ALT2 display with related to Nitrox data:

  • accumulated O2%;
  • current PO2;
  • FO2 set point


Aeris A100 doesn't have dedicated bar graph for O2% - only its digital representation.

If condition arises - you will be presented with automatic Safety Stop reminder. It set for 4.5 meters for 3 minutes.

If we ascend faster than allowable maximum limits - dive computer will activate Fast Ascent alarm. When this happens - all VARI segments will be flashing.

Dive computer constantly monitors our PO2 and O2 status and if certain conditions exists - it will give us with High O2 or High O2 alarms with all corresponding data on displays.

If we exceed our No-Decompression Limits (NDLs), Aeris A100 activates Decompression mode. Upon entry into this mode - full TLBG will flash and you will see guiding arrow and DECO Stop depth. From this moment all calculations will be made regarding to Decompression mode.

The most important data in this case:

  • our correct DECO Stop depth position;
  • DECO Stop depth;
  • DECO Stop time;
  • Total Ascent Time (TAT) on DECO ALT1 display


Also dive computer shows other dive data on DECO Main and alternative displays:

  • current depth;
  • max depth;
  • Elapsed Dive Time (EDT);
  • accumulated O2% (if Nitrox);
  • current PO2 (if Nitrox);
  • FO2 set point (if Nitrox);
  • other applicable icons


During DECO mode diver may create violations, which happen if he/she ascends shallower and stays for some time above the displayed DECO stop depth without correcting it, or diver may descend deeper than Maximum Operational Depth (MOD), or decompression requires ceiling depth range between 18 m and 21 m deep – in this case Aeris A100 activates appropriate Violation mode and manages it to help us safely perform decompression and ascend in those situations.







After the dive and after the Transition period in 10 min, following functions and displays will be accessible:

  • Dive Planner - to plan consequitive dives ( range 9-57 m);
  • No-Fly and Desaturation Countdown Timers;
  • Logbook for Air & Nitrox modes (it stores dive data for 12 the most recent dives);
  • Set FO2, alarms, utilities, view ID;
  • CLEAR Nitrogen memory


Aeris A100 doesn't support PC download/upload function, so you should be aware of this!







Aeris A100: What Divers say


  • has everything that you may expect from the basic dive computer;
  • easy and clear to read display at any conditions;
  • very easy to set up and use;
  • easy to press buttons even in thick gloves;
  • easy to replace battery;
  • well written user documentation



  • no PC feature;
  • small Logbook memory


Aeris A100 is a very basic dive computer that is still not lacking some advanced features, like Dual Algorithm, for example. It can be recommended dive computer as a backup device, or for dive shops to give it for rent, or for recreational divers and beginners who don't require something fancy and technical!

During our test dives we found it very reliable and accurate. We could easily use it as a backup (after some adjustments) for Aeris Atom Ai and Oceanic Atom 2 dive computers - all calculations were pretty identical.

User manual is one of the most easiest to learn and follow, and dive computer itself is so intuitive, that we didn't even need to go through the manual sometime to understand what to do to set it or dive with it!

Display is easy to read, and its layout is very intuitive.

Aeris A100 dive computerAeris A100 Wrist

Dive-Computer-Wizard Rating
golden star golden star golden star golden star half star


You may definitely invest in Aeris A100 dive computer if you require no more than basic instrument for pure recreational diving, for backup, or as an entry level device. It is accurate, reliable, user-friendly, and have all functions to cover variety of diving conditions that is only constrained of diving with Air and 1 Nitrox mix with FO2 up to 50%.
Dive shops may consider it as an instrument that is possible to give for rent and earn some money!



Add comment
Jack, 12 August 2014 08:40
Great Solution For Novice & Casual Diver

Aeris A100 performed great on both nitrox and air dives. I used it every day in my vacation and I was impressed by the large display with easy to read numbers, and easy to set up and dive with. And this dive computer has only 1 control button - perfect solution for novice and casual diver!

Aaron, 20 July 2013 03:32
Very Basic Functions Good Enough For The Kid

I've bought Aeris A100 wrist dive computer for my teenager son year ago. He learnt A100 pretty quick and was ready for diving with it at the same day. No any issues with user docs or interface.

He likes one button easy access and not too many technical aspects that could make this dive computer hard for understanding.

I may stress that A100 is good even for kid to start diving - so easy to learn and operate. Later in a future when he upgrades for something more technical - I will leave this comp for backup.

James, 18 February 2013 09:23
Good Dive Computer But Lacks Gauge mode

I've been diving recreational for the last 5 years and bought Aeris A100 wrist not long time ago - just wanted to upgrade from Aeris XR2, and wanted something easy.

Aeris A100 mostly suits my recreational needs, but sometimes I feel that I'm missing some level of freedom with this dive computer. And it's obvious - Aeris A100 doesn't have Gauge mode.

Everything else works like a dream - easy user interface, intuitive and easy to read display, perfect documentation. And Dual Algorithm is quite handy feature - it was proven while diving with my mates, who had various Aeris and Oceanic models.

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