IQSub FX CCR Review – Chest Mount Rebreather

FX CCR review
FX CCR review

IQSub FX CCR Review – Chest Mount Rebreather

As a technical diving instructor and an avid diver with years of experience, I have had the opportunity to extensively use and teach with the FX Closed Circuit Rebreather (CCR) made by IQSub. This remarkable piece of diving technology offers a blend of innovation, reliability, and performance that caters to both seasoned technical divers and those new to rebreather diving.

Design and Build Quality

The FX CCR impresses right from the start with its robust build quality and attention to detail. The unit feels solid and durable, constructed from high-quality materials that ensure longevity and resistance to the harsh marine environment. The compact and ergonomic design makes it comfortable to wear, even during extended dives.

IQSub‘s typical approach of expedition-grade rebreathers is evident in the FX CCR. Every component can be disassembled and reassembled without tools, making it an ideal choice for expedition diving where quick and easy maintenance is crucial. All parts are crafted using computer-controlled CNC machines, ensuring exceptional precision and high quality. The electronics are potted and gold-plated contacts are exclusively used, preventing moisture creep into any of the sensitive electronics and enhancing overall reliability.

Performance and Functionality

One of the standout features of the FX CCR is its exceptional performance. The unit provides a smooth and efficient breathing experience, thanks to its advanced scrubber system and precise oxygen management. The rebreather uses a radial scrubber, unique to this kind of rebreather, whereas other manufacturers still use the less efficient and higher work of breathing axial scrubbers. The automatic setpoint control works flawlessly, maintaining optimal oxygen levels and ensuring a safe and enjoyable dive.

The FX CCR‘s integrated heads-up display (HUD) is intuitive and easy to read, providing all 3 cell ppO2 readings at a glance. The HUD is part of the Shearwater Research controller package, known for its reliability and user-friendly interface. The FX CCR operates on the DiveCAN protocol, allowing it to interface with a variety of devices, including another wrist-mounted computer or the NERD (Near Eye Remote Display) computer.

FXCCR CO2 Scrubber and scrubber housing
FXCCR CO2 Scrubber and scrubber housing
Shearwater Research Petrel 3 Controller
Shearwater Research Petrel 3 Controller
Shearwater Research HUD
Shearwater Research HUD
IQSub FXCCR functional diagram
IQSub FXCCR functional diagram

User Interface and Ease of Use

For a piece of equipment as complex as a CCR, the FX model excels in user-friendliness. The control system is based on the Shearwater Petrel 3 line of controllers, which are renowned for their intuitive and straightforward operation. The Petrel 3 features a stunning 2.6” AMOLED display, protected by a toughened glass lens and titanium bezel, making it both durable and easy to read. The device supports DiveCAN, which is a robust and flexible protocol allowing seamless integration with various components, including a HUD, another wrist-mounted computer, or the NERD computer. This flexibility ensures that the FX CCR can be customized to meet the specific needs of any diver, making it accessible even for those new to closed-circuit rebreathers.

Shearwater Research Petrel 3 controller
Shearwater Research Petrel 3 controller
Shearwater Research NERD
Shearwater Research NERD

Safety Features

Safety is paramount when it comes to rebreather diving, and the FX CCR excels in this regard. The unit uses three oxygen sensors, ensuring accurate and reliable monitoring of oxygen levels. It is equipped with a low-power, stainless steel solenoid with potted connections and an industrial IP67 connector cable, enhancing durability and reliability. The FX CCR also comes standard with a BOV (bail-out valve), making it the only unit in its class at this time to offer this feature. This ensures that divers can seamlessly switch to open circuit in case of an emergency, providing an added layer of safety.

FXCCR Head assembly with solenoid and 3x Oxygen sensor cells
FXCCR Head assembly with solenoid and 3x Oxygen sensor cells
IQSub Shrimp Bail Out Valve
IQSub Shrimp Bail Out Valve
FXCCR Oxygen Solenoid
FXCCR Oxygen Solenoid

Maintenance and Support

The FX CCR is designed with ease of maintenance in mind. The modular components are easy to access and service, reducing downtime and ensuring that the unit is always ready for the next dive. Additionally, the manufacturer offers excellent customer support and a worldwide network of service centers, which is invaluable for ongoing maintenance and troubleshooting.

Conclusion

In conclusion, the FX Closed Circuit Rebreather is a top-tier choice for technical divers seeking a reliable, high-performance rebreather. It is super lightweight for traveling, weighing only 11kg, and is user-friendly due to easy donning and doffing. It boasts the highest performance of all chest-mount rebreathers, making it suitable for beginner rebreather divers up to exploration divers. Additionally, it is an excellent choice as a second rebreather in dual rebreather setups or as a bailout rebreather. Its combination of advanced features, user-friendly design, and robust safety measures make it an excellent investment for those looking to explore the depths with confidence. Whether you are an experienced diver or new to rebreathers, the FX CCR is a standout option that delivers on all fronts.

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