The P-Port Display System is a versatile option, ideal for many users, whether an SCR diver or someone modifying their SCR to closed circuit. The basic unit consists of the DS-1 Digital Display and a Draeger style P-Port fitting as shown above left. The P-Port fitting accomodates three K1-D oxygen sensors (not supplied).
There are several options that can be added to the basic setup, including the block as shown above centre. This block has three connectors which then accept the DS-1 Digital Display, as well as the optional Heads-Up-Display (HUD), and a VR3/VR2 cable. Instead of a VR3 you can also use a second DS-1 Digital Display for redundancy of all three sensors. The block also contains isolation circuitry so that in the event of a failure of a cable or device, the other device is not affected. For example, if the DS-1 cable is cut and shorted out by sea water, the VR3 readings are not affected, and vice-versa.

The fitting can be used with any rebreather that is fitted with a Draeger P-Port in its counterlung (breathing bag) providing there is sufficient space for the sensor holder. Such units include the Draeger Atlantis and Dolphin, and the Submatix SCR. It can also be used with any rebreather which is capable of being fitted with a Draeger P-Port fitting, such as the OMG Azimuth and UBS40, and many Russian ex-military rebreathers. Most rebreathers with back mounted counterlungs can be easily fitted with a P-Port. Click these links to see some example fittings.

When the VR3/VR2 cable is used, the VR3/VR2 takes its reading from one of the three existing sensors in the P-Port, eliminating the need for excessive numbers of sensors.

The Heads-Up-Display consists of a mouthpiece mounted housing with two LED's, one red, one green. When this is fitted, the diver selects their desired setpoint in the display unit's calibration menu, and the HUD indicates PPO2 information to the diver based on voting logic from all three sensors. A green LED indicates PPO2 is close to setpoint, short red flashing indicates low PPO2, and long red flashing indicates high PPO2. This method was chosen as it is simple, green is good, red is bad.

Main Features

- Plugs directly in to Draeger P-Port found on many rebreathers
- Houses 3 K1-D Oxygen Sensors
- Displays 3 O2 Sensor readings continuously
- Displays Battery Level
- LCD Backlight
- Auto On/Auto Off

Other Features

- Optional Heads Up Display (HUD)
- Optional VR3/VR2 Interface Cable
- Isolated fault tolerant outputs on Block
- One button calibration and set-up
- Battery 180 / 700 Hours (Backlight On/Off)
- 12 Months Stand-by life
- Aluminium housing tested to 600 metres
- Small Size 72mm Diameter x 36mm Depth


Availability and Pricing

Availability expected December 2006

For price information, go to the Prices page.

For more information, go to the FAQ page.