I find this all very interesting. Don't get me wrong, I want to love the checkers and did at first until I ran into problems and started really paying attention to the result. That is why I am looking at other options or workflows. I am waiting on GHL to get the kinks worked out of the ION-D and for it to go back in stock. I have high hopes for it, but those may be optimistically misplaced.
Do Hanna Checkers have different colour LEDs?
- Thread starter Garf
- Start date
Check this page on iorodeo.
Tutorials - IO Rodeo Blog
Tutorials are project-based posts and step-by-step guides on ways to make or use open source tools in science investigations.
blog.iorodeo.com
It has write-up on nitrate, phosphate ammonia and nitrite. Step by steps for making standards, choosing different test kits, and measuring absorbance with the best LED available for those particular jobs. I think it's what you're hunting for.
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