My use case is probably different from many but matches one of the advertised use cases used by the vendor. I have a modest artificial pond with koi and goldfish. To purify the water I use a home made three barrel filter system that feeds a waterfall that meanders from the filter area upstream to the pond. interested in knowing water temperature and pH. For this limited use, this monitor works well. The pH monitor updates about every second, while the temperature monitor probably updates closer to ten seconds. Both are of course within the scope of my interests. Unfortunately, because I live in New England and received this item in November, I had a very small window of opportunity for real-world testing before shutting down the filter and waterfall for the winter. My fish will squat and hibernate under the forming ice. Until next spring. For the limited time I used the device worked flawlessly. I have power in the filter section that powers the UV lamp and bubbler. I use this wattage to power this unit using the included wall plug. The supplier provides mounting hardware and various inspection and testing solutions to adjust the accuracy of various measurements. I calibrated the pH sensor as this is the value I want to measure. I haven't calibrated any others, although I keep track of all the available features because, well, I can laugh. The device makes a solid impression. I cleaned the sensors for indoor winter storage. If there are any issues when I use again this spring I will update my review accordingly. Since this device meets all the requirements that interest me, I award 5 stars.
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