[PSUBS-MAILIST] Optical Oxygen Sensors

[Jon Wallace via Personal_Submersibles]

 CO2 meter has an RS485b analog model.  But I'm curious, why use voltage instead of serial?
Jon

    On Wednesday, August 7, 2019, 09:45:45 PM EDT, Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:  
 
 Hi,I've been reading a bit about the solid state optical oxygen sensors whichhave a longer life & are more reliable than traditional galvanic cel ( battery)type O2 sensors. Poseidon developed them for the dive industry & they were hailed as a breakthrough at the time. There is a company, SST sensing that is marketing them for varying applications....https://www.sstsensing.com/optical-oxygen-sensors-key-benefits-and-applications/Is any one familiar with them? There seems to be a big price difference betweenvarying brands.The ones I've seen are calibrated internally for pressure & temperature & transmit data rather than a voltage or current reading. I am looking for a cheap option that has a current or voltage signal rather than data & I will be using something like a raspberry Pi or Arduino to process the reading.I am also wanting 3 as in a rebreather to compare readings.Do they need much of an O2 flow over them or are they ok just being placed randomly within the hull?Cheers Alan_______________________________________________
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