CCR Liberty Anatomy

Each component has been specifically designed to build the most capable rebreather on the market. The freedom of having built and designed the CCR Liberty from the electronics to each detailed component allowed us to move away from old principles and think outside the box. This way of thinking to use principles of redundancies from the aerospace industry allowed us to create a truly exceptional machine with features that make the CCR Liberty a paradigm shift among rebreathers.

No unnecessary air space.

Our units were designed to have minimum air space inside. This means that there is no need for the diver to carry an unnecessary amount of additional weight resulting in a heavy unit to carry on the surface and an overweight unit underwater.

Head features

Where the magic happens.

The Liberty head houses all of the electronic components ensuring the operation of the rebreather and is the most crucial component of the whole unit. All the main components responsible for the rebreather operation are installed and function in redundancy. In the event of a component failure, a backup system allows ensures reliable operation of the unit for you to stay on the loop. The diver can then vote out individual components in the user menu.

2 Control Units (CUs)

located in individually sealed compartments, tested to 350m, they communicate with each other through the O2 cell block. In case of a battery or CU failure, the second CU takes control over the unit operation utilizing its redundant side of components allowing the diver to remain on the loop.

2 Handsets (HS)

Every unit comes with 2 handsets. Operate your unit through 1 or 2 handsets. In the event of a damaged handset (HS), there is no effect on the function of the unit as the Control Units (CUs) are located within sealed independent compartments. The handsets contain the vibration alarm motors, thermometers, inclinometers, accelerometers, and light sensors but none of the critical computational components.

4 Displays

Every CCR Liberty comes with two handsets, operating in coordination with the HUD/ODA and buddy display. All the connectors are water-resistant and ensure operation even in case of flooding.

HUD – Head-Up Display

Displays your PPO2 information while in dive mode and other information in standby mode. The HUD incorporates a rotating shade and has a colour-blind mode. Alternative to the HUD is ODA – Optical Display Adapter which displays your dive information on the screen right in front of your eye.


An alternative to choose from instead of the HUD. Get the most important information about your dive in real-time right in front of your eye. The ODA also features a built-in compass and buddy display.

Buddy Display

The Buddy Display either glows/flashes green or red and keeps your buddy aware of the function of your unit.

Head components

All the components inside of the head are sealed off to stay protected in the case of flooding. The components can be detached and replaced using a 3 mm hex key. Ideal for expedition diving as they can be easily exchanged out in the field.

1) 4 Oxygen sensors

2 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.

2) 4 pressure sensors in 2 blocks

2 for each part of the unit. 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.

3) 2 helium sensors

With Divesoft’s patented technology proven and tested in our Analyzers. 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.

4) 2 Magnetic Solenoid Valves

The solenoids (each for its corresponding half of the unit) are a single source of gas for the unit and they alternate when operating based on a predictive algorithm, – the unit opens the solenoid for a specific amount of time, based on your Setpoint, Current PPO2, and your depth, providing accurate oxygen addition for a smoother diving experience. They are designed to be in a closed position when inactive and they are protected from each end to prevent any debris from getting inside.

5) 2 Li-Ion Batteries

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.

CCR Liberty in Detail #3 | Rebreather Head



Liberty uses a radial type scrubber for the following reasons:

  1. The best work of breathing performance.
  2. Flood tolerance characteristics - radial scrubbers can still operate in the case of partial flooding which increases the safety of the diver.
  3. Heat insulation due to the warm gas travelling between the outer wall of the scrubber canister and the soda lime. This prolongs the scrubber's operation time.

Under the EN 14143:2013 standard, the tests resulted in the endurance of the scrubber of 2 hours 48 minutes (production of CO2 being 1,60 L/min).

The simple design allows the scrubber to be easily and safely filled in a matter of minutes.

STACK TIME: the unit calculates your stack time for you to know how long has your scrubber been used. You can also set up a reminder to be let know when your scrubber reaches a certain time of its use.

CCR Liberty in Detail #6 | Scrubbers


Explore the loop components.

Bayonet connections

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. This allows quick and safe attachment preventing the loop from disconnecting underwater.

CCR Liberty in Detail #14 | LOOP ATTACHMENT


Select from our in-house made Dive Surface Valves (DSVs) or Bail Out Valves (BOVs) which are manufactured from the highest quality materials and fully configurable based on your preference.

Divesoft DSV

DSV is a simple and reliable mouthpiece which has 2 operating positions:

Opened (Dive mode)

Closed (Surface mode)


  1. Simple and reliable.
  2. Streamlined and light design.
  3. In all the backmount configurations with back mounted counterlungs and the sidemount configuration the DSV comes fitted with Manual Addition Valves (MAVs) which are located next to your mouth. "Find your mouth, find your MAVs."
  4. All the mouthpieces are fitted with original Draeger mushroom valves.

Divesoft BOV

The Divesoft BOV allows you to switch to Open Circuit with one turn. It has 2 operating positions:

Closed Circuit Mode

Open Circuit Mode


  1. Robust and reliable.

  2. Manual addition valves (MAVs) are located next to your mouth in all backmount units with BMCL configurations. "Find your mouth, find your MAVs".

  3. BOV utilizes adjustable original APEKS 2nd stage for the best breathing performance.

  4. All the mouthpieces are fitted with original Draeger mushroom valves.

Unique MAVs - Manual Addition Valves

"Find your mouth - Find your MAVs"

The Manual Addition Valves are part of every CCR Liberty configuration. The Oxygen addition is located on the exhale side to avoid breathing in too much PPO2 at depth. On all FMCL configurations, the MAVs are located on the counterlungs. On all BM BMCL and SM configurations, the MAVs are conveniently designed to be next to your mouth. There they can be easily found without having to look for them. As the diver in trim would have his/her arms in front of their body they can always easily locate the MAVs for manual addition of gas should it be needed. The position of the MAVs is particularly beneficial in tight restrictions where the diver is always able to reach them. The MAVs can also be used as a mean to Off-board gas.

SHA - Single Hose Adapter

Any BOV can be equipped with SHA which reduces the number of hoses feeding the 2nd stage regulator of the BOV and the MAV from 2 to 1 LP hose.


CCR Liberty in Detail #4 | BOV/DSV/MAV

ADV - Automatic Diluent Valve

Our in-house built ADVs will provide you with precise delivery of Diluent. Just select your favourite position based on its features.


Pick your favourite way of Diluent delivery

The automatic diluent valve functions on the same principle as a standard regulator. The membrane inside will depress when it is affected by negative pressure, opening a valve that adds diluent into the loop.

The ADV can also be integrated into the T-piece of the inhale counterlung which is the most popular option. It is a choice for divers who prefer to manage their loop volume by themselves, having maximal control in their hands.


CCR Liberty in Detail #5 | ADVs