Is there anywhere online that I can find a picture showing the colors of the DPD powder test with different concentrations of chlorine?
Are you guys confusing the DPD Test with the FAS-DPD? The latter measures FC by number of drops, the former compares colors. Unless I'm the confused one. Still waiting on the OP to describe what they are after... sounds like their test uses powder. Is there a DPD Test that uses powder instead of liquid, or is powder only used in the FAS-DPD test? I'm missing something...Since that's not how the concentration of free chlorine is measured, I highly doubt there is any reference. But from my experience, the higher the FC, the darker pink the sample turns once the powder is added. But I never had FC higher than 10ppm, so I don't know if it gets even darker pink, or goes to red above that level.
Have at it and keep us posted. Lots of trial and probably even more error but it will be neat if you can create something.I'm working on an idea for an automatic chlorine test which would ideally measure the color of the water after the powder was added to measure chlorine concentration.
It’s great for a spot check. Between 7.5 and 15 will probalby be in range for you. Dosing from that is a whole ‘nother story.The Lamotte ColorQ does exactly what you are describing. How reliably it does it is the question.
I think that is the crux of this effort. If the end result is a gizmo that will tell me close enough that I don't have to get off the couch today, that's one thing. But if the invention is one that would allow me to leave my pool for a week or two and guarantee that my FC will hold the entire time and my pool will be algae free, and swimmable, upon my return, that is another. I don't need the former, I'd pay a bundle for the latter! Please get to work on that, and then a pH version right after. Thanks!Dosing from that is a whole ‘nother story.
When my IC60 reached end of life there was NO question it was being replaced, even as suddenly as it quit. The only question was if I bought this one from that place or that one from this place. Upon telling the Mrs she instantly asked if I bought a new one yet. Not quite yet honey, But thanks for the Approval nonetheless.But if the invention is one that would allow me to leave my pool for a week or two and guarantee that my FC will hold the entire time and my pool will be algae free, and swimmable, upon my return, that is another. I don't need the former, I'd pay a bundle for the latter
I think that is the crux of this effort. If the end result is a gizmo that will tell me close enough that I don't have to get off the couch today, that's one thing. But if the invention is one that would allow me to leave my pool for a week or two and guarantee that my FC will hold the entire time and my pool will be algae free, and swimmable, upon my return, that is another. I don't need the former, I'd pay a bundle for the latter! Please get to work on that, and then a pH version right after. Thanks!