Oxygen Scientific GREENFLASH O2 Sensor

[J-Vo]

Does anyone have the exact measurements or a technical drawing of the sensor. I have a plan to install them in my SF2 but i think they are bigger than the ones it is build fore….

Solid State Sensor Sauerstoff

Der Solidstate Sensor kann gegen analoge Sauerstoffsensor ausgetauscht werden, ohne zusätzliche Elektronik / Akku☝ Jetzt kaufen

www.dive2.me

 

[SavageSeaCow]

Does anyone have the exact measurements or a technical drawing of the sensor. I have a plan to install them in my SF2 but i think they are bigger than the ones it is build fore….

They. Are 2.7 cm in diameter by 3.6 cm long

 

[Markus MDDT]

This behavior is because they periodically check in while sleeping to see if there's oxygen. You have to activate them by bringing the pO2 above 0.5atm Conversely they need to be *below* 0.3atm to go to "sleep" again.

I'm running three and I get about 6 months out of them before I need to change the battery, but I forget to flush O2 below 0.3 atm sometimes so they stay awake on the ride home. Changing the battery is just taking the metal clip off with needle-nose pliers, carefully pulling the lid back while not unplugging the flex cable, popping in a new battery and re-clipping. Easy. Agree the fatty CR2477 batteries are about $1 USD per.

My friend has been running the Solid stat cell with 2 galvanic in the JJ for about a year. What we have noticed is that it seems like the ss cell is sending out an analogue pulse instead of the constant voltage like from the galvanic. This seems to sometimes to missmatch with the reading increments of the petrel. This means that sometimes the calibration can be a little bit of or during diving there can be a missmatch btwn galvanic and ss which in a few seconds goes back to matching. Also the nominal voltage is a little bit lower than healthy galvanic. Does it make sense and have anyone else seen this? Do you think this is correct assumptions?

 

[Markus MDDT]

My friend has been running the Solid stat cell with 2 galvanic in the JJ for about a year. What we have noticed is that it seems like the ss cell is sending out an analogue pulse instead of the constant voltage like from the galvanic. This seems to sometimes to missmatch with the reading increments of the petrel. This means that sometimes the calibration can be a little bit of or during diving there can be a missmatch btwn galvanic and ss which in a few seconds goes back to matching. Also the nominal voltage is a little bit lower than healthy galvanic. Does it make sense and have anyone else seen this? Do you think this is correct assumptions?

I should clarify. it does not pulse. it is just updating its analog signal once a second. Its like the difference btw an lp and a cd. the "wave" is smooth on the analog lp and it is in steps on the digital cd.
My friend also played around a bit and noticed that its possible to communicate with the cell. I think its just a matter of time until you can set in the SW controller if the cell used is digital or analog and the controller will communicate digitally with the cell. Anyone more knowledgeable in this area who would like to share?