Hollis Prism 2 Rebreather | Scuba Center has been selling quality recreational, commercial, and public safety diving equipment since 1973. You will find a wide selection of equipment at both our Minneapolis and Eagan, Minnesota locations.

Type T (Technical) Closed Circuit Technical Diving Rebreathers | Training and support available at Scuba Center in Eagan, Minnesota

Hollis Rebreathers | Hollis Prism 2 closed circuit Rebreather 
Authorized Hollis Rebreather Dealer

Scuba Center is a SAM ( formerly CCR ) registered supplier for the United States Government.  Our customers include: U.S. Coast Guard, U.S. Navy, U.S. Federal Government Agencies, Law Enforcement Agencies, Search and Rescue (SAR) Teams, Fire Departments, State and Local Government agencies, Commercial Diving Companies, School Districts, Television and Movie production companies, and many others.
CAGE Code:

  Home View Cart

Hollis Prism 2 Rebreather

Scuba Center is an authorized Hollis Rebreather Dealer.
This is your assurance that your equipment will come with the full manufacturer's warranty.

Hollis Prism2 fully closed circuit Rebreathers | Hollis Gear

Hollis Rebreather History:
Bob Hollis had his first rebreather experiences in the mid 60’s. He used Draeger units to allow him to get close to Sea Otters and other marine life in Monterey Bay. In 1970, Hollis made some of the first dives on the Electrolung rebreather using Heliox down to 300 feet in Honduras and Bonaire, filming ship wrecks and deep reefs. In 1990, Bob & Oceanic developed the “Phibian” rebreather, which at the time was the only commercially available unit.
The Prism2 is a fully closed circuit Rebreather, ideal for exploring open ocean, cave, or wrecks. This unit can be electronically or manually controlled which means you choose how you want the loop PPo2 maintained.

Includes shoulder mounted counter lungs and rear mounted radial scrubber which provide easy breathing with low resistive effort and low hydrostatic loading. The standard kit includes an electronic secondary control and primary LED displays with a backplate/wing assembly that provides a complete kit ready to dive out of the box. Unit can also be purchased with or without tanks/valves.

PRISM 2 BUILDER | Customize your Prism 2 Rebreather with the options below and see your final price. 

Breathing Loop
It’s breathing loop which is a keyed one way assembly consists of a closable mouthpiece assembly with mushroom/check valves either side, which ensure uni-directional flow.

The Explorer's design makes it a dream for the recreational diver looking for a safe and easy way to explore the bottom at leisure and without disturbing the sealife with bubbles.

Status check
With the electronics switched on, the secondary also provides a status check for the battery and displays the set point selected for the dive along with other critical information. The electronics vote between the three proprietary galvanic sensors and control the operation of a low wattage solenoid valve on the oxygen supply.
Scrubber design
A radial flow scrubber canister is mounted vertically on a backplate attached to the integrated BC, between twin supply cylinders (one each, oxygen and diluent).
The electronics, sensors and batteries are mounted in the electronics head assembly at the top of the scrubber, with supply hoses feeding over the diver’s shoulders into the top of the counterlungs. An analog LED primary display offers a quick reference of unit performance with status and alarm indicators while an independent digital OLED secondary display verifies the unit’s performance.
Counter lungs
Dual, front mounted counterlungs provide the diver with a flexible reservoir equivalent to the maximum displacement of the diver’s own lung volume and ensures the lowest possible hydrostatic loading.

These counterlungs are fitted with both automatic and manual gas addition systems and a variable volume control valve (used upon ascent to vent excess expanding gas volume or to purge the loop). Diluent addition is automatically achieved as hydrostatic pressure increases and the counter lung collapses against the valve actuator.
Secondary Display (COMPUTER)
The Shearwater Predator is the computer display on the Prism 2 and was chosen for this application as it is one of the most advanced mixed gas CCR computers available today. The Predator is designed to control the Prism 2 setpoint and uses a basic decompression algorithm known as Buhlmann ZHL-16C which has been modified by the use of Gradient Factors.
Primary Display (HUD)
The Primary Display (HUD) consists of 3 bicolor (red/green) LEDs
mounted on either the right or left side of the DSV/BOV mouthpiece just below eye level. Each LED provides a status indicator for its corresponding O2 sensor by using a “Smithers Code” flashing the status on a cycling 5-second loop during the dive.

Hollis Prism 2 Features:

Hollis Prism2 fully closed circuit Rebreather | Sales and training available at Scuba Center in Eagan, Minnesota.
The PRISM 2 is an electronically or manually controlled, constant PO2, modular, closed circuit diving system. A rebreather recycles rather than vents the exhaled breath. The exhaled breath passes into a closed loop, where it is pushed through a chemical absorbent (scrubber) to remove the carbon dioxide, and returns through the other side of the loop for the diver to re-breathe, hence the name "closed circuit rebreather" or CCR.

  • Shoulder mounted counterlungs provide easy breathing with low hydrostatic loading

  • Unit weight when fully charged, in standard configuration - approx. 47lbs

  • 3.5 Liter split counterlungs allows inhale and exhale counterlungs for high work loads

  • Counterlung drains for easy to remove water during a dive

  • All gas lines external to the breathing loop prevents leaks from affecting the PPO2

  • Automatic diluent addition valve adds diluent during descent or when the loop volume is low

  • Manual diluent addition valve adds on board or off board diluent for loop flushing

  • Gases - Air, Trimix, and Heliox

  • Manual oxygen addition valve allows for manually controlling oxygen PPO2

  • High performance open circuit Bail Out Valve option

  • Integral harness and BC or Backplate standard makes the Prism 2 ready to dive out of the box

  • Full range of wings/harness gives the ultimate customization

  • Accepts 13, 19, or 30 cu.ft. cylinders for flexible gas management

  • Eye level LED Primary display provides easy to monitor system status

  • Displays PPO2 for each oxygen sensor is used to control PPO2 manually & assure electronics system is nominal

  • External power switch is easy to power on

  • Easy calibration with a push button O2 calibration

  • Large OLED Secondary Display is easy to read, even for your buddy

  • PPO2 Monitoring of Three Sensors Continuous display of each sensor’s PPO2, mv reading easy to access

  • Closed Circuit & Open Circuit, 5 gases supports diluent switching & Multi-gas mix dive plans

  • 2 button push OC bailout - If you have to leave the loop, quickly switches to bailout support

  • CNS Tracking based on real time oxygen exposure

  • Software Update via web

  • Dive Log download and software updates via Bluetooth

  Hollis Prism 2 Rebreather | YouTube Video Price: $8999.95*
    * Base price does not include: Training, Cylinders, Valves, BOV, or accessories.
PRISM 2 BUILDER | Customize your Prism 2 Rebreather with the options below and see your final price.

Unit specific training is required for purchase of each rebreather model.  Our prices do not include training.
Courses are available at our facility in Eagan, Minnesota or from properly qualified Instructors around the world.

Training on the Hollis Prism 2 with PADI Course Director James McKay Certification Courses Type T (Technical) CCR | Contact us for details

All Rebreather Sales are face to face sales (in-store). Online sales are not authorized on Hollis Rebreathers.

For questions about any of these Rebreathers, please contact us.

Due to the unique nature of Rebreathers, these products are Non-returnable.

Hollis Prism 2 Accessories

Hollis Prism 2 Rebreather Accessories | BOV

Prism 2 Bailout Valve (BOV):
The Prism 2 BOV is the newest accessory for your Prism 2 eCCR. It is a lightweight and high performance DSV (Dive Surface Valve) and regulator (BOV - Bailout Valve) in one which is a direct bolt on for your rebreather. The BOV is easily installed by replacing the standard DSV.
Prism 2 BOV

Price: $649.95


Prism 2 O2 Sensor:
  • Oxygen Sensor for Prism 2 Rebreather

  • 3 required for unit operation

Prism 2 O2 Sensor (Replacement)

Price: $109.95

Sofnolime™ CO2 Absorbent for Hollis Explorer Sport Rebreather | Available at Scuba Center in Eagan, Minnesota

Sofnolime™ CO2 Absorbent:
  • Soda lime absorbent for the removal of carbon dioxide from gas streams

  • Only use the specific absorbent recommended by your rebreather manufacturer

  • 44 lb Keg. (high-density polyethylene [HDPE] re-closable container)

  • 812 Grade

SOF812 8-12 Mesh / 1.0 -2.5 mm 44 lbs. Keg

Price: $175.00

Related Items

Analyzers Computers Faber Cylinders
Lubricants OmniSwivel Adapters Valves

While these are excellent reference materials, in no way should this information be considered a replacement for proper training for the specific type of diving in which you plan to participate.