I would like to be able to test the chlorine level in my pool and then adjust accordingly. Commercial chlorine sensors are very expensive although there are very cheap Chinese ones for sale on eBay.
Anyone know how these cheap ones work, they have two prongs so I'm imagining dissimilar metals, electrolysis or some such. Any idea on accuracy? Can the probes be in constant contact with the water or will they coat or rot? Any help much appreciated.
You go first, and Let us know how that works out for ya.