With so many SCUBA diving systems including CCRs on the market, it can be tough to pick the right one. You need a good understanding of the various options and features available, in order to select the best system on the market.
There are two main types of systems: closed circuit rebreathers (CCR) and semi-closed circuit rebreathers (SCR). Most divers consider the closed kind to be superior in performance. Therefore, there are a lot more CCRs on the market than there are SCRs. Below are reviews of two CCRs to help you select the best rebreather on the market.
Hollis Prism 2 Rebreather
The Hollis Prism 2 is an electronic closed-circuit rebreather which is perfect for deep cave and wreck diving. Hollis, the manufacturer behind the Prism 2, is renowned for its high quality scuba diving and snorkeling gear.
The Prism 2’s gas efficiency makes it a top contender for the position of best rebreather on the market. It is designed to absorb carbon dioxide from every exhaled breath, and to recycle unused oxygen. In this way, the unit maintains a constant stream of warm gas to the user for breathing. This is unlike an open-circuit compressed-air breathing apparatus, which releases exhaled air directly into the water. Go to http://www.hollis.com/ to find more information regarding Hollis rebreather.
Key Features of the Hollis Prism 2 Rebreather
- A Radial scrubber design, which promotes efficient use of the scrubber.
- Three replaceable, galvanic O2 sensors, which analyze the oxygen content of scrubbed air to determine how much needs to be added.
- A battery-powered, primary head-down LED display, which enables hands-free monitoring of the loop content.
- An independent analog secondary display that is driven by the O2 sensors, and continues to work even after the battery is dead.
- A 9V battery, which can last up to 40 hours at a temperature of 70F.
- Sealed electronics located outside the breathing loop.
- Shoulder-mounted counterlungs for easy breathing. Each counterlung has a purge drain at the bottom.
- Pre-Dive user-selectable PO2 Setpoints
- A reliable, waterproof and magnetic slide on/off switch
- Weighs about 47 lbs when fully charged with 19 cu ft tanks
- Compatible with three bottle sizes: 13, 19 and 30 cu. ft.
- Neutral buoyancy• Dimensions (h x w x d): 21 x 17 x 9
Inspiration Rebreather with Vision Electronics
The Inspiration CCR by Ambient Pressure Diving (APD) is arguably the best rebreather on the market. This award-winning, best-selling unit was first launched in 1997, and at the time, it was the only mass produced closed-circuit rebreather on the market. It is great for expedition dives of up to 100m, and has been the rebreather of choice for film makers and sports divers for more than a decade.
Key Features of the Inspiration Rebreather with Vision Electronics
- A vision electronics package, which includes head-up and wrist-set displays for hands-free monitoring of the loop content, battery status and diving time
- Three liter bottles which are easy to prepare and maintain
- Dual independent oxygen control system
- Over-the-shoulder counterlungs for low hydrostatic pressure
- Accurate PO2 control
- Dimensions (h x w x d): 57.5cm x 40cm x 35cm
- Weighs 63.9 lbs. (29 kg)
- 180 minutes absorbent duration (797)(4°C, 40RMV, 1.6 lpm CO2)
- Updateable software, including Nitrox Deco, Trimix Deco and log-viewer software
- Upgradeable hardware which enables you to keep up with developments as they occur
- Dual power supplies
- Automatic diluent valve (ADV)
- Auto air for open circuit bailout
- Audible warnings
- Automatic setpoint switch
Hollis Rebreather Valve
When you purchase the best rebreather on the market, don’t forget to buy a valve to go along with it. The 2-pound Hollis Rebreather Valve is the perfect addition to your oxygen or diluent cylinder. It comes in two configurations–200 & 300 Bar DIN–and is compatible with nearly all of the current rebreathers, including the Hollis Prism 2. The 300 Bar DIN valve, which is the newest, also comes with a shock-resistant rubber knob at the bottom to protect it. Other key features include Viton O-Rings and durable chrome plated brass.
Closed-circuit rebreathers have become very popular for deep diving, which is a testament to their performance. The Hollis Prism 2 and Inspiration Rebreather are two of the best units on the market. However, picking the best rebreather on the market is a personal decision. It depends on several factors, including the type and number of dives you do, as well as the amount of time you can dedicate to maintaining the rebreather.
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