Halcyon Symbios™ Chest Mount Rebreather (CCR)

Engineered for Exploration. Designed for Freedom.

The Halcyon Symbios™ Chest Mount Rebreather is a next-generation closed-circuit rebreather (CCR) designed to integrate seamlessly into the way modern technical divers explore. Compact, streamlined, and engineered for unmatched work-of-breathing in all positions, the Symbios™ empowers divers to go further, stay longer, and experience the underwater world with absolute clarity and silence.

Streamlined Performance & Advanced Safety

Combining relentless innovation with a modular, travel-friendly build, the Symbios delivers excellent breathing performance through its patented BOV/ADV system and large CO₂ capacity. Safety is paramount: the unit features a dual hybrid O₂ sensing system (electrochemical paired with GreenFlash™ digital O₂ technology), adaptive setpoint control, and tactile vibration alarms located directly at the chest for immediate, intuitive alerts during critical conditions.

⚙️ Technical Specifications

• Design: Sleek, ultra-slim, low-profile chest mount design that dramatically improves trim, comfort, and accessibility. Travel-friendly and fully EN 14143 compliant.
• Breathing Loop: Features a patented BOV/ADV (Bailout Valve / Automatic Diluent Valve) system with a large CO₂ capacity for extended expeditions.
• O₂ Sensing: Advanced hybrid dual sensing utilizing both traditional electrochemical sensors and GreenFlash™ digital O₂ technology.
• Electronics & Display: Includes the Symbios Handset featuring a transflective color display (readable in all light conditions), responsive tactile buttons, and a clean, customizable interface.
• Battery Life: Rechargeable battery providing approximately 40 hours of runtime for extended dive trips.
• Smart Connectivity: Redundant wireless communication with powerful Symbios App integration for pre-dive checklists, firmware updates, and dive log reviews.