FAQ

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There are actually quite a few subtle differences between the X-CCR and the Defender CCR, but here are a few of the main highlights:
Primary Electronics Shearwater Primary Electronics, located in CCR head SG-1 primary electronics, located in wrist unit
User Updatable Method Bluetooth USB
Secondary PO2 monitoring User choice using stainless steel, 300m rated connector User choice using stainless steel, 300m rated connector
Digital Cylinder Pressure Display Standard N/A
Digital Compass Primary & Secondary Secondary only
Sensors CO2, 3 x Oxygen 3 x Oxygen
Oxygen Sensor Type SMB (Coax) Connector Molex Connector
Battery 2 x Removable 18650 Lithium Rechargeable Internal rechargeable UN38.3 certified Li-ion battery pack
Decompression Calculation Buhlman ZHL-16C + GF & User Selected Secondary Buhlman ZHL-16C +GF in Primary & User Selected Secondary
Scrubber Type Radial Radial
Scrubber Size Options 8, 5.5, 4.4 lbs 9.1, 8, 5.5, 4.4 lbs
Counter Lungs OTSCL or BMCL OTSCL or BMCL
Automatic Diluent Valve Integrated T-Piece ADV Standard Plunger style ADV standard on OTSCL, Integrated T-Piece ADV optional on BMCL
Manual Addition Valves Oxygen & Diluent MAVs standard Oxygen & Diluent MAVs standard
Off-Board Gas Addition Multiple methods, user selection Multiple methods, user selection
Canister Size 2 sizes 2 sizes
Canister Material Aircraft Grade Aluminum or Delrin Aircraft Grade Aluminum or Delrin
Bail Out Valve Shrimp BOV Shrimp BOV
Both the HammerHead Classic Head (flat top) and the Extreme Head (curved top) can be updated to a Defender CCR Head.  Both heads will contain all functionality of the Defender CCR Head.  Additionally, both 3 cell and 4 cell models of the Extreme Head can be updated.

Extreme Head

Classic Head

Various options and pricing are available HERE.

In order to keep your rebreather functioning at its best, it’s important to keep up with routine maintenance and care.  By properly maintaining your rebreather, you will reduce future repair costs, optimize your rebreather’s performance and extend its life.  Here are 6 regular maintenance needs to keep in mind. To read up on details of each of these particular points, check out the full article here.

  1. Be proactive
  2. Keep it dust-free
  3. O-ring care and maintenance
  4. Disinfecting 101
  5. Track the life of your cells
  6. Solenoid Care and Replacement

While this isn’t an all-encompassing list of items needed to maintain and care for your rebreather, these can certainly help!  Following a regular maintenance and care routine is an important step to keep your rebreather functioning properly for years to come.  Doing so will reduce the chance of missing dives due to equipment failures and increase your overall experience while diving your rebreather.  Follow your unit-specific rebreather manual for detailed information about the care and maintenance of your unit and consult the manufacturer to see when your rebreather should be serviced. 

 

Defender CCR

The Defender CCR with the SG-1 electronics package utilizes a rechargeable, sealed lithium ion battery. Battery duration can vary widely depending on several factors including amount of time the solenoid is firing, brightness setting of screen display, water temperature, air temperature and age of battery. Typically, a fully charged battery will last in the range of 12-14 hours between charges (based on a 50% solenoid firing ratio). SubGravity highly recommends recharging the primary handset nightly to ensure the unit does not dip below a sufficient voltage. We recommend never starting a dive with a voltage lower than 3.6 volts.

X-CCR

The X-CCR utilizes dual, removable, rechargeable, 18650 lithium batteries. When the voltage dips below 3.2 volts on the primary battery, the secondary battery takes over. Each battery lasts approximately 10 hours depending on such factors as amount of time the solenoid is firing, brightness setting of screen display, water temperature, air temperature and age of battery. SubGravity highly recommends recharging the batteries nightly to ensure the unit does not dip below a sufficient voltage. We recommend never starting a dive with a voltage lower than 3.6 volts.
There are many factors which influence the duration of the Defender CCR and X-CCR scrubbers, including temperature, depth, workload, and the actual size of the scrubber. The following chart should be considered an average duration only and should be adjusted down based upon the above mentioned factors as appropriate:
  • 9.1 lbs – 7 hours (expedition size scrubber for Defender CCR only)
  • 8 lbs.   – 6 hours (standard size scrubber for full size units)
  • 5.5 lbs. – 4 hours (standard size scrubber for travel size canister)
  • 4.4 lbs. – 3 hours (mini size scrubber for travel size canister)
WARNING: Exceeding factory stated scrubber durations will lead to serious injury or death. Please refer to your SubGravity approved training and the appropriate user manuals for more information and specifications regarding scrubber duration.
Currently, we have three service centers for SubGravity related CCRs.
  1. USA – SubGravity
  2. UK – SubGravity LTD
  3. Europe – SubGravity EU