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Thread: solid state o2 and co2 sensors use similar tech?

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    RBW Member theJonas is an unknown quantity at this point theJonas's Avatar
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    solid state o2 and co2 sensors use similar tech?

    Hello everyone!

    Doesn't the new poseidon ss sensor use infrared light to detect o2 level just like some of the co2 sensors work? It should be possible to fit both functions in one sensors or what do you think?

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    Re: solid state o2 and co2 sensors use similar tech?

    Good question. At the moment the SS sensor, once it becomes available at the current moment I believe will be a standalone. How it will get branched out into network divisions or digital bus systems is yet to be determined. It will be interesting to see how all these different technologies will collide and integrate to work in some sort of fashion. There's no doubt that the technologies are on the forefront of making some incredible new realizations.

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    Re: solid state o2 and co2 sensors use similar tech?

    unlikely to be able to incorporate into one sensor due to the wavelengths being different for CO2 and O2. Same basic refraction technology can be used, but the wavelength is very specific to the gas trying to be analyzed. To analyze for two gasses would basically require two modules in the same sensor and double the size. I am not sure what the current CO2 sensors are doing, but whatever it is isn't working reliably due to the humidity
    Last edited by tbone1004; 26th June 2016 at 23:56.

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    Cognitive surrender TopLeft is an unknown quantity at this point TopLeft's Avatar
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    Re: solid state o2 and co2 sensors use similar tech?

    Engineer co worker (non diver, mind you), brought up an issue stating that temperature could have an appreciable influence to the readings.

    Beyond my learning, so is this a known factor?

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    Re: solid state o2 and co2 sensors use similar tech?

    Nope, different technology and physics.

    Some CO2 cells fire infrared light across a chamber and measure how much light is absorbed, which is affected by the presence of CO2.

    These O2 cells work by firing one frequency of light at a window coated in fluorescent dye. The dye responds by releasing light of a different frequency. The presence of O2 quenches and delays that response.

    The frequencies are different, one has light going through the gas and the other does not, the things being measured are different and the signal processing is radically different.

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