Shearwater Petrel 2 EXT
The Petrel 2 is a dive computer for technical divers of all levels. Works with air, nitrox, and trimix gasses. The Petrel 2 can be used for open-circuit and closed-circuit diving, as well as gauge mode if desired right out of the box.
The key enhancements for the Petrel 2 include a next generation three-axis tilt-compensated digital compass and bluetooth upgrade to Bluetooth Smart™, for communication with iOS devices such as the iPad and iPhone. In addition to current Shearwater and third party support for Mac and PC desktop applications, users will now be able to download dives using their iOS devices in conjunction with third party applications.
External PO2 Monitoring
The Petrel EXT has a Fischer connector for monitoring of 1 or 3 external oxygen sensors on any rebreather equipped with a 7-PIN Fischer Cable. (The Petrel will not support 2 sensor configurations.) Closed-circuit divers using a Petrel EXT can choose between using the external oxygen cells, or a user-defined set-point for decompression calculation.
Shearwater dive computers use B_hlmann ZHL-16C with Gradient Factors as the decompression algorithm. User adjustable conservatism can be done by manipulating the gradient factors. An optional VPM-B algorithm may be purchased if desired.
For more information, see the video from Shearwater here.
The 2.4" Color LCD display is easy to read, with high contrast, and automatic screen brightness. The display may be customized with user-defined font colors, and may be inverted for those who wish to wear the Petrel on their opposite arm.
The Petrel features a single battery compartment, which will support the use of any AA-sized battery. The Petrel will operate about 35 hours on a quality alkaline battery. Saft LS14500 batteries used by the Shearwater Predator can also be used, and offer the longest life - about 90 hours on the medium brightness setting. Li-Ion, NiMH, Photo Lithium 1.5 and Zinc-Carbon 1.5 batteries can also be used.