CCR Liberty Features

It's what's on the inside that counts.

Where the hardware and the software come together. This integration, designed from the ground up, works in sync to create a rebreather with features unlike anything else on the market. Apart from the complete redundancy of all crucial elements and the multiple configuration possibilities, the CCR Liberty offers a range of features that continually improve the ease and effectiveness of the Liberty's operation.


Redundant systems

Two is one and one is none.

Being able to remain on the loop is critical. Therefore, our goal was to create a unit that will ensure your safety and keep operating no matter what, so you can remain on the loop even in the event of multiple failures.

Vibration alarms

Go beyond visual alarms.

The handsets contain vibration alarm motors which inform you about any important message you need to know.

Wet connectors

Even if your connectors flood, they will keep working no matter what.

Pressure sensors inside of the Head

Know your loop pressure.

Know your loop pressure to a tenth of a millibar. Positive / Negative checks completed in 1 minute each. PREVENT A FLOOD WITH A PERFECT PRESSURE TEST. Know your loop pressure when switching to Bail Out rebreather.

Li-Ion Batteries

Protected power houses.

Each is powering each half of the head. USB rechargeable. Easy to exchange. Each battery is insulated to work in extreme environments and has an exhaust valve. In case of gas discharge from within the battery, gas will be vented out into the environment and not into the breathing loop. Battery life: 35+ hours in Dive Mode, up to 11 months in Standby Mode.

Helium sensors

The Helium sensors can be used as a redundant method of measuring PPO2 when used with Helium mixes. In the unlikely case of loss of all O2 sensors, the Helium sensors can be used to calculate your PPO2.

Detachable components

Designed for easy maintenance during expeditions.

All you need to access and replace head components is a 3 mm hex key.


Smart Oxygen sensor logic

It is not about the number of O2 sensors. It is about handling the information.

The unit uses 2 Oxygen sensors for each control unit located in a sealed block. Smart algorithm. The unit compares one cell with the other 3 cells and then performs the same test on each remaining cell. This process is constantly repeated throughout the dive. In the case that one cell shows different values it is excluded from the system however still monitored Diver is informed by vibration. In the case that the cell is just temporarily lagging with its reading and starts operating again, the unit will vote the cell back in. The diver can exclude/vote in the cells manually.

Most efficient O2 calibration

CCR Liberty is calibrated by a supplied calibration jig which directs gas flow directly to the O2 sensors, allowing for minimal gas use for the most accurate calibration of your cells. The unit takes into account the altitude the calibration is performed in. The Divesoft Mobile application can be used to easily verify the correct mV values of your sensors.

Predictive Algorithm

For the smoothest ride.

The unit fires the solenoid for a specific amount of time, based on your Setpoint, Current PPO2 , and your depth, providing accurate oxygen addition for smoother diving experience.

Oxygen cell tester

Test your O2 sensors for their reliability.

Turn your head into an oxygen cell tester and check the weakest part of your rebreather, the oxygen cells. The testing set uses the CCR Liberty head, which it changes to an electronically controlled pressure chamber. It automatically measures values in 1,00 to 3,50 bar pressures. The result is displayed in a simple chart.

Ability to disable Solenoids and sensors

You are in control.

In case of a component failure, a backup component ensures the operation of the rebreather allowing you to stay on the loop. The diver can vote out individual components in the user menu ranging from Solenoids, Oxygen sensors to Pressure sensors. You have full control.

Protected Solenoids

Secured Solenoids to prevent against failure.

The solenoid inlet contains a filter and the solenoid outlets are fitted with duck bills preventing any debris from getting inside the solenoids from either side.

Failed solenoid detection

In case of either solenoid‘s failure in the closed position, the rebreather informs the diver by vibration about which solenoid is faulty. The diver can then manually disable the solenoid. We use magnetic solenoids which remain in the closed position until opening increasing safety by reducing the risk of the solenoid staying stuck open.

Air integration

See your pressure on the displays.

Wireless integration with pressure sensors significantly simplifies gas pressure checks in both cylinders. This reliable system provides simplicity and increases awareness by displaying the cylinder’s pressure on the user’s handset in graphical or numerical form. The unit is also able to calculate the estimated metabolic oxygen consumption.

Closed Cylinder Detection

Revolutionary improvement in safety.

This feature significantly increases the safety of the diver. When the unit is used in conjunction with Air Integration, if the unit enters dive mode with closed cylinders, or looses the high pressure the system warns the diver with a visual warning message and handset vibration about low pressure in the system.

1st stage regulator leak detection

Do your bubble check before entering the water.

The Air Integration allows you to detect leaks from 1st stage regulator/cylinder valve connection as a part of your Pre-Dive check.

Use your head as Gas Analyzer

Use your Head as a gas analyser if. You can also analyse helium mixes as long as your Helium content is over 30% when used with Helium sensors.


Bayonet connections

Smart locking.

The Head and Counterlungs use a smart system of bayonet connections. Hoses can't be accidentally exchanged or disconnected. Yet, they are very easy and safe to connect.


See your point of submerging in your Dive Log.

An integrated GPS / Glonass unit can pinpoint your immersion position. Thanks to this, you can always log the coordinates of your descent or ascent point, making it very simple to return at any time to your favourite diving spot or a wreck out on the open sea. The GPS location will now be a part of all your dive logs. Based on your GPS location the unit also automatically adjusts to the local time.


Simple to use


The unit's user interface was designed to be easy and intuitive to use. Even divers completely new to CCR diving or divers who are accustomed to a different user interface will in a very short time feel at home operating the Liberty.

Bailout CCR Mode

When OC bailout is not enough.

Any unit configuration can be used as a Bailout CCR using the BO Standby Dive Mode.

Bluetooth connection

Connect to your phone or computer with ease.

Wireless connection to a mobile phone or desktop computer will make downloading your dive logs and updating your firmware versions enjoyable and significantly more efficient. Liberty communicates with the desktop application “” for Windows and iOS and a mobile application “”for Android and iPhone.

Built in Pre-Dive Check

Test before you dive.

The semi-automatic pre-dive check verifies that all electronic systems, sensors, and solenoid valves are under your control. In simple 11 steps, you can quickly very your unit is ready to dive.

Pressure tests done in 1 minute

Be sure your loop is sealed.

The positive and negative pressure test is done in 1 minute each. This accurately detects any leaks of the breathing loop to prevent flooding. Simply evacuate/inflate the loop until the unit tells you to stop and starts a 60 sec. countdown. You can monitor your actual loop pressure within 0,1 millibar. Assurance that your unit is safe to dive.

Integrated Splash Checklist

Always ready on your Handset.

Double check everything right before your dive from the integrated Splash Checklist.

4 Available setpoints

All SP's you may need.

You can enable up to 4 Setpoints.

  • Descent (optional)
  • Low
  • High
  • Deco (optional)

Changing between Setpoints is simple.

  • Hold top button = Setpoint UP
  • Hold bottom button = Setpoint DOWN

Select from multiple dive screens

Select only the screens you would like to see.

You can easily enable/disable the screens you would like to see during the dive and easily switch between them. In the case of using both handsets, you can display different information on each Handset.

Bail Out Remaining Time

Know when your BO is enough.

The unit also calculates your Bail Out Remaining Time based on the volume of BO gas that you have available. A vibration reminder will notify you when you are about to reach a point of having just enough BO gas to return back to the surface so you can start heading safely back home. The information about how much longer your TTS would be if you stayed 2, 5, or 10 mins longer at the depth is also available.

Divesoft App

Have it all on your phone.

Have all your other dive information in your Divesoft App which also works offline. Dive Planner, Assembly checklists, O2 Calibration, O2 cell life reminders, Dive Logs, Your checklists, Trip planner and lots more, are all available for you to get everything done on your phone.

Firmware updates

Keep getting new features.

Your Liberty is fully ready to dive and does not need to be FW updated. However, we constantly work on improving the efficiency of the system and introducing new functions which we make available to you in case you would like to utilize them.


Where the difference really matters.

The WOB played a crucial role in designing all the Liberty configurations. Not only does the WOB affects your comfort underwater but also your safety. Breath comfortably and efficiently in all positions.

Work of breathing (WOB) affects the overall comfort and safety underwater. A low WOB performance is crucial in deeper diving. While diving, the pressure of the environment increases the density of the gas being breathed, requiring a low work of breathing from the breathing apparatus. In rebreathers, the work of breathing is mainly dependent on the design of the gas flow inside the unit and the positioning of the counterlungs.

On the CCR Liberty, the counterlungs are located at the highest point of the unit, providing excellent WOB performance.

Physics plays its role here. Usually, low WOB results are achieved with front-mounted counterlungs followed by the back-mounted counterlungs, which due to their slightly over-the-shoulder placement, in the case of Liberty, allows the work of breathing to remain at its optimal performance.

The placement of the counterlungs on the Liberty Sidemount also allows for excellent work of breathing. However, in that case, the work of breathing is very dependent on the proper placement of the unit on the diver. Nevertheless, you will be always able to breathe from the sidemount unit in any position you may find yourself in.


Divesoft company disposes of its own in-house testing facility which allows us to perform a wide range of testing to develop and manufacture our products.

The testing facility contains equipment such as:

  1. Pressure chambers capable of simulating 600m depth
  2. Electronically controlled pressure chamber for a long period testing
  3. Fatigue testing systems
  4. Precision scales
  5. Calibration gas mixtures
  6. Industrial grade sewing machines for prototype manufacturing
  7. The in-house development of mechanical components and electronics is located next door.

The key component is "Big Bertha", a pressure chamber capable of pressure equivalent of 300m, capable of fitting a whole rebreather unit inside. The unit is mounted on a pivotable mount allowing testing in various positions. The chamber is connected to an electronically controlled breathing machine and various sensors allowing us to test and monitor equipment in extreme conditions including tests in water temperature of 4°C.


  1. Unique bespoke design by Ales Prochaska
  2. Built by the equipment manufacturer for nuclear powerplants
  3. Depth rated to 300m/1000ft
  4. 1m diameter, height 1,2m
  5. Weight 2t including 600kg lid
  6. Meets standards EN 250 and 14143
  7. Equipped with a water cooling system