Chlorophenol red detection paper is pH sensitive & in this image shows strong contrast when the water pH is 8 or even higher alkalinity. See other images below to compare results at different pH levels.
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I bought these for the purpose of locating hard to observe, intermittent water leaks. By strategically placing small sections of the paper in various places, I was able to monitor on a schedule rather than guessing when the leaks might happen. Now the leaks are fixed and I can monitor periodically for signs of new problems.
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Fast shipping and working well to identify water leaks.
Glad it worked. This may help others better understand the different leak detection sheets, check out: Find Water Leaks Fast: Cars, Boats, Roofs, Plumbing.
This water detection paper worked well in identifying moisture intrusion during testing and was easily observable due to its high color contrast.