[PSUBS-MAILIST] Scrubber color sensor

[Alan James via Personal_Submersibles]

 I like the idea of color indicating absorbent, only problem is my scrubber will be positioned where I can't see it.I just did a quick Google & came up with this color sensor.RGB Color Sensor with IR filter and White LED - TCS34725
  
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RGB Color Sensor with IR filter and White LED - TCS34725
 By Adafruit Industries Your electronics can now see in dazzling color with this lovely color light sensor. We found the best color sens...  |  |

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If you put multiple sensors down the outside of an acrylic scrubber canister you couldread the color change in the absorbent & have it displayed elsewhere. You could perhaps use the one sensor board with multiple sensors. Another variation isthat you may be able to pick up the heat from the chemical reaction with the infraredsensor & monitor levels that way.  An additional thought on this subject is to put a second CO2 sensor at the outlet of the scrubber to pick up early when there were higher concentrations of CO2 coming out.So sensor 1 is the ambient atmosphere concentration & sensor 2 is showing whatlevel of CO2 there is from the scrubber that will be mixing with the atmosphere.Alan

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