New lifetime oxygen sensor gives failsafe diving
After 5 years of extensive R&D testing and design iterations, Poseidon Diving Systems AB of Sweden is proud to introduce its ground-breaking oxygen solid state sensor. This absolute and factory-calibrated sensor provides an accurate and highly reliable digital output. This is a true breakthrough in oxygen sensing for many applications and in particular, “CCR” technology.

Poseidon is presenting the Solid State Sensor in conjunction with the M28 and the CPOD because this is the “eco system” in which the Solid State Sensor will initially work.

The CPOD performs the same function as the 3rd Cell Holder, but the distinct difference is that the CPOD gives out a digital output as well as an analog output. The 3rd Cell Holder just gives analog output as existing sensors are all analog galvanic cells. The new SSS is digital so it needs the CPOD and will not function with the 3rd Cell Holder. The CPOD is also capable of reading old-style galvanic cells.



Got questions about the Poseidon M28 and Solid State Oxygen O2 Sensor? We have answers!

Q: When I try to start the M28 dive computer I get only green-green-red flash?
A: You need to use a USB power supply 5.1V with at least 1A

Q: With what configuration will the Solid State O2 Sensor work?
A: They will initially only work in conjunction with the M28 computer and CPOD. The M28 / SSS / CPOD
configuration can be used as a back up sensor / third cell with any rebreather as well as obviously with the SE7EN.

Q: What would be the difference in the M28’s readings connecting a CPOD or just going from the M28 straight to the Poseidon head?
A: When M28 is connected to only the CPOD, you get loop ppO2 displayed only from the CPOD, and all the decompression based on this information. When M28 connected directly to SE7EN, you get two ppO2 values, high pressure gauge from both diluent and O2, decompression from Se7en, battery status and much more. Also the M28 will know if you are on open-circuit or closed-circuit.

Q: Is it possible to run a CPOD & third cell?
A: The CPOD can ether use the analog galvanic cell or the new digital solid state O2 sensor, where the CPOD is communicating all information digital on the bus.

M28 can not use the previously 3rd cell holder because this is a pure analog signal.

Q: Will the solid state O2 sensors be able to be used as primary cells?
A: The solid state O2 sensor requires an digital interface which the current version of e-module not have. The e-module has to be upgraded to handle the new digital solid state O2 sensor. After upgrade the e-module can handle ether type of sensor (analog galvanic or digital solid state).

Q: What will be the computer logic settings if the analogue sensor parameters activate a warning response and the SSS does not?
A: The logic around the cells is treated the same way as earlier cells. Independent if there is two galvanic cells or two solid state cells, or a mix of them two. We have one active cell that we validate, and one backup cell. It is still the same logic that we used since MKVI.

If the solid state O2 sensor or a galvanic cell is mounted in the CPOD and connected to M28, it is used as a independent monitor of the loop and will alarm if the sensor value not match the set point. The level we accept from the set point is the same as we have been using in the MKVI and SE7EN.