The team researched on the potential chemical reactions that may be used for measuring pH and ruled out the route because they are not accurate and only of one-time usage. We also looked for low-tech pH sensors for plants and found out them are not suitable for pure liquid.
We further searched on temperature sensors in case that pH measurement does not work out. We found a sensor with 0.5-degree Celsius sensitivity and emailed Dr. Hammil for his opinion. The group will meet again on Friday to assemble the Arduino board for the liquid volume sensors.
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