Pirates Rebreather Ltd. is proud to be an authorised dealer of the Hollis Prism 2 Rebreather—an advanced system designed for exploring open ocean, caves, and wrecks.
The PRISM 2 is a modular, closed-circuit rebreather (CCR) that can be operated in either electronically controlled or manually controlled mode, giving divers the flexibility to choose how loop PPO2 is maintained. It is a constant PO2 system and is CE approved to EN 14143:2013 standards.
The unit offers the choice of front-mounted or back-mounted counterlungs, allowing divers to configure the system to suit their diving style and environment. Combined with the rear-mounted radial scrubber, the Hollis Prism 2 delivers exceptionally easy breathing, with low resistive effort and reduced hydrostatic loading.
Tested by ANSTI at depths of 100 metres, the Prism 2 achieved one of the lowest work of breathing (WOB) ratings of any mixed-gas CCR on the market—just 0.94 J/L.
The standard kit includes an electronic secondary control system, primary LED displays, and a backplate/wing assembly, providing a complete package ready to dive straight out of the box. Tanks and valves are available separately.
The back-mounted counterlung positions the lungs behind the diver, keeping the chest clear for the attachment of additional cylinders and accessories. This improves streamlining, reduces drag, and promotes better horizontal trim in the water.
Its two-piece bag design enhances work of breathing (WOB) performance while allowing easy removal of the internal lung for cleaning or replacement.
The ADV upstream valve design is both reliable and resistant to free flow, helping to preserve valuable diluent gas. All gas delivery systems on the Prism 2 feature both automatic and manual operation for added control and safety.
Water-trapping T-pieces retain excess water within the breathing loop inside the counterlung, making drainage simple and efficient. Streamlined hose fittings keep low-pressure hoses routed close to the diver, reducing overhead interference and improving overall comfort.
Machined DIL and O2 MAV controls provide a rugged, dependable design and also allow for offboard gas plug-in on both sides, offering greater flexibility for advanced diving configurations.
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 counterlung collapses against the valve actuator.
The Prism 2 utilizes a user-packed, radial 2.5kg CO2 scrubber, which features the best possible duration, insulation and work of breathing on the rebreather. The scrubber canister is mounted vertically on the backplate and between twin supply cylinders (one each, oxygen and diluent).
The clear scrubber bucket is molded from Engineered Thermoplastic. This Hollis exclusive design ensures the CO2 scrubber is installed, packed and provides a visual for positive loop integrity.
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.Prism 2 now supports the latest in oxygen sensor technology featuring:
The Primary Display (HUD) consists of 3 bicolour (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.
The Shearwater Petrel 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 Petrel 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.
Prism 2 now supports the latest in oxygen sensor technology featuring:
The Prism 2 BOV is considered a basic safety device for the rebreather by many professionals and meets the requirements for training in Technical rebreather courses
A Full Range of Customisation Options. Ordering a Hollis Prism 2 has never been easier. Quickly add accessories such as our high performance BOV, tanks and valves, wing and harness type, all right from the factory.
Full Feature List:
Full Feature List:
The standard kit includes an electronic handset, independent heads-up display, and a backplate/wing assembly that provides a complete kit ready to dive out of the box. The Prism 2 can be purchased with or without tanks/valves.
The back-mounted counterlung positions the lungs behind the diver, keeping the chest clear for the attachment of additional cylinders and accessories. This improves streamlining, reduces drag, and promotes better horizontal trim in the water.
Its two-piece bag design enhances work of breathing (WOB) performance while allowing easy removal of the internal lung for cleaning or replacement.
The ADV upstream valve design is both reliable and resistant to free flow, helping to preserve valuable diluent gas. All gas delivery systems on the Prism 2 feature both automatic and manual operation for added control and safety.
Water-trapping T-pieces retain excess water within the breathing loop inside the counterlung, making drainage simple and efficient. Streamlined hose fittings keep low-pressure hoses routed close to the diver, reducing overhead interference and improving overall comfort.
Machined DIL and O2 MAV controls provide a rugged, dependable design and also allow for offboard gas plug-in on both sides, offering greater flexibility for advanced diving configurations.
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 counterlung collapses against the valve actuator.
The Prism 2 utilizes a user-packed, radial 2.5kg CO2 scrubber, which features the best possible duration, insulation and work of breathing on the rebreather. The scrubber canister is mounted vertically on the backplate and between twin supply cylinders (one each, oxygen and diluent).
The clear scrubber bucket is molded from Engineered Thermoplastic. This Hollis exclusive design ensures the CO2 scrubber is installed, packed and provides a visual for positive loop integrity.
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.Prism 2 now supports the latest in oxygen sensor technology featuring:
The Primary Display (HUD) consists of 3 bicolour (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.
The Shearwater Petrel 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 Petrel 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.
Prism 2 now supports the latest in oxygen sensor technology featuring:
The Prism 2 BOV is considered a basic safety device for the rebreather by many professionals and meets the requirements for training in Technical rebreather courses
A Full Range of Customisation Options. Ordering a Hollis Prism 2 has never been easier. Quickly add accessories such as our high performance BOV, tanks and valves, wing and harness type, all right from the factory.
Full Feature List:
Full Feature List:
The standard kit includes an electronic handset, independent heads-up display, and a backplate/wing assembly that provides a complete kit ready to dive out of the box. The Prism 2 can be purchased with or without tanks/valves.
