We’ve heard a lot of skepticism about pHin and Sutro (two Kickstarter-type remote automated pH and Chlorine monitor projects that have eventually taken off, with pHin being acquired by Hayward).
Sutro has interestingly scrapped their first design already and chosen to use the same method as kit-based testing, but using a cartridge of reagants and sensors to do what we might do when checking the color of the resulting tests manually.
Here is their latest update:
blog.mysutro.com
What do folks think? Again, Sutro appears to be taking the chemical kit-based approach and just using automation and colorimetric sensors to replace the need for a human eye and hands to scoop up the water sample, add the chemicals, and look at the sample colors.
Sutro has interestingly scrapped their first design already and chosen to use the same method as kit-based testing, but using a cartridge of reagants and sensors to do what we might do when checking the color of the resulting tests manually.
Here is their latest update:

How Simple, Safe, and Seamless Drove Our Design Process

What do folks think? Again, Sutro appears to be taking the chemical kit-based approach and just using automation and colorimetric sensors to replace the need for a human eye and hands to scoop up the water sample, add the chemicals, and look at the sample colors.