Halcyon Symbios BLUE Handset

The compact dive computer for open-circuit and closed-circuit diving
The Halcyon Symbios Blue is the more affordable version of the proven Halcyon Symbios, intentionally designed without closed-circuit (CCR) functionality. Developed for sport and technical divers alike, the Symbios Blue offers the essential features for demanding dives — including mixed gas and gas switching — in an exceptionally robust and compact housing.
The transflective 2.4″ full-color display provides excellent readability under all lighting conditions — both in direct sunlight and in darker environments. The intuitive two-button operation with tactile feedback allows for easy navigation, even when wearing dry gloves.
Thanks to support for oxygen, nitrox, and trimix, the Symbios Blue is ideally suited for a wide range of open-circuit (OC) dive profiles. The integrated Bühlmann ZH-L16C algorithm with adjustable gradient factors ensures accurate calculation of decompression times and stops.
The rechargeable Li-ion battery provides up to 30 hours of dive time, while the internal memory stores up to 1000 hours of dive logs. Optional add-ons such as the GPS Pod, DPV interface, or Tank Pod allow seamless integration into the Halcyon Symbios ecosystem.
With its durable construction, vibration alerts, and digital 3-axis compass, the Halcyon Symbios Blue is the ideal companion for all divers who value simple and clear operation.

• Supported gases: Oxygen, Nitrox, Trimix
• Dive modes: Open Circuit, Fixed Setpoint CCR
• Algorithm: Bühlmann ZH-L16C with adjustable gradient factors
• Display: 2.4″ transflective full-color display (320 × 240 px)
• Operation: 2 buttons with tactile feedback
• Battery: Rechargeable Li-ion battery, up to 30 hours runtime
• Memory: 1000 hours of log time (5-second sampling)
• Maximum operating depth: 120 m
• Connectivity: Compatible with Symbios GPS Pod, DPV interface, Tank Pod, and future modules
• Sensors: 3-axis digital compass, vibration alerts
• Housing: Compact, impact-resistant, and suitable for all environments
• Note: Does not connect to wireless rebreathers