The Subsea Systems range of PPO2 devices is designed and built to be Fault Tolerant, Versatile, Simple, and Strong.

FAULT TOLERANT

In rebreather diving, redundancy is the key. You always carry bail-out, a second device to breath from if your main unit fails. You should do the same with your PPO2 display.
The Subsea system provides you with the ability to use two totally isolated displays. The system uses cell isolation to protect your displays from failure of one device affecting the other. For example, if you have a DS-1 Digital Display connected to one port, and a VR3 Dive Computer connected to the other port, if the DS-1 fails, or it's cable is cut or shorted, the VR3 will continue to display a valid reading from sensor one.
If your VR3 fails, or it's cable is cut or shorted, the DS-1 will continue to give valid readings of ALL THREE sensors.
For full triple redundancy, you can plug a DS-1 in to each port, and in that case, a failure of either unit or it's cable will not affect the other DS-1, which will continue to display valid readings for ALL THREE sensors.
Some other rebreather electronics use a simple 'Y' or paralleling of devices which they claim is redundancy. However, this only protects you from simple electronic faults within one device, or a flat battery, it DOES NOT protect you from damage to cables or connectors. If you have a damaged cable with one of these set ups, BOTH of your displays will fail to give valid readings. YOU WILL HAVE NO VALID PPO2 INFORMATION. Our sensor isolation protects you from this situation.


VERSATILE

The Subsea Systems design architecture allows the user to expand and modify their system as and when required. You can start with a simple set up and expand to a full system later, or add other devices as they become available. For example, you can start with just a DS-1 Digital Display, adding a Connector Block, HUD, or VR3 Cable as your needs grow. Later you could add the IH-1 Intelligent HUD.


SIMPLE

There's only one button on our DS-1 Digital Display, and you can't get to it underwater. The DS-1 automatically turns itself on before you dive, and off again after you come back, and it ALWAYS displays the PPO2 reading from all three sensors, so the info is ALWAYS there ready for you.


STRONG

Our housings are tested to conditions that you as the diver will hopefully NEVER have to endure. No, we don't park a pick-up truck on them, we test them in a wet pressure chamber, to a depth of 2000 feet. No, that's not a typo, 2000 feet, that's over 600 metres! Makes the pick-up truck test look a bit wimpy doesn't it!
The failure depth on our housings fitted with a pluggable cable is 650 metres (2131 ft), and the failure depth on our hard wired housings is, well, sorry we can't tell you, our wet test chamber only goes to 720 metres!

All our Connector Blocks, HUD's, Kidneys etc are fully potted. There is no chance of water intrusion whatever the depth.

We also test our displays for temperature tolerance. The displays will continue to operate even when frozen in a solid block of ice