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HW Firmware

OSTC 2 2017 model

Starting at: £570.00



This new version of the OSTC 2 makes this classic computer more slender but retains the big display and powerful battery.  With the new design the OSTC 2 has become slimmer and fits snugly on the arm and is also available in additional colours, on request.

The new OSTC 2 is a compact dive computer and recharging is wireless using the inductive charging pad supplied.

The OSTC 2 can be operated both with the firmware hwOS sport edition and the firmware hwOS tech edition.  The tech edition covers all ranges of technical diving including trimix and rebreather diving whilst the sport edition supports nitrox diving with three gases.

If you choose the sport edition initially, the OSTC 2 will stay your companion, even if you want to develop yourself in technical diving, as an upgrade is available to the full trimix dive computer.

Both version offer a wide range of configuration options and additional functions such as an apnea mode or a digital compass. The OSTC 2 operation is intuitive and its big colour display adjusts to the ambient light and is readable anytime, both in sunshine and in a dark lake, and two integrated sensor buttons can be easily used with thick gloves or ring systems

Developed and produced entirely in Germany, the OSTC 2 is backed by years of experience and continuous improvements.

Last but not least, it comes with free firmware updates, an interactive user forum, rapid service and competent support.

Standard features include:

  • Processor:        Low-power Microchip PIC18F87K22
  • Data storage:     4 MegaByte Flash memory
  • Display:            High-resolution display (IPS LCD) with ambient light sensor Field of view: 170°
  • Screen resolution: 320 x 240 Pixel Size: 2,4” (63 mm screen diagonal)
  • Connector:        Bluetooth Smart Ready (2.0 und 4.0)
  • Sensor:            Combined depth/temperature sensor 3D compass (fully tilt-compensated)
  • Battery:            Rechargeable lithium ion battery
  • Battery tilfe:      Up to 60h operating time and standby 2 years
  • Charges:           Wirelessly via inductive charging
  • Controls:           Two piezo buttons
  • Housing:           High resistant ABS housing, scratch resistant borosilicate-glass panel
  • Integrated Bungee Mount
  • Dimensions      76 mm x 78 mm x 30 mm
  • Weight            170 gr.
  • Max depth:      120 meter
  • 6 Programmable gases (Nitrox, Trimix or Heliox) - 5 pre-defined and 1 additional gas configurable during the dive should the unexpected happen
  • User definable last stop depth
  • Gauge/Apnea mode

The OSTC 2 package contains:   OSTC 2 Dive computer, Firmware by Heinrichs Weikamp, Solid neoprene box, Charging Pad, Screen protector (already installed)


  • Manufactured by: Heinrichsweikamp

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