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Oregon Scientific Thermo-Hygrometer with Indoor/Outdoor Display
Sales Rank: 61
Features:
![]() Rating: - Accurate Enough (How to Calibrate an Hygrometer)My unit reads 4% low, which is about par for an inexpensive hygrometer. The digits are readable across the room, however, and I can subtract 4 in my head. You can check the accuracy of your hygrometer as follows: Take a big bottle cap full of salt (a teaspoon or two) and add a few drops of water to it. You want a stiff paste, not liquid salt. Put your hygrometer and salt-laden bottle cap into a tupperware container and seal it up. (Make sure that you can read the hygrometer through the walls of the container without opening the lid.) Leave everything alone and sealed for 24 hours (while the air inside the container settles). A properly calibrated hygromter will read exactly 75%. Rating: - a must for piano ownersI'm a professional piano technician, and I would strongly recommend this product for piano owners. Pianos suffer damage when exposed to temperature and humidity changes, and this product helps to monitor that. If you are getting wide swings in either number, you should either move the piano or make adjustments to your HVAC setup. Rating: - Description is misleadingI bought this thinking that it would show the outside humidity which is very important where I live. It does not. It only gives indoor/outdoor temperatures and INDOOR HUMIDITY. Since most people don't have a problem with the indoor humidity this info is not worth much. It seems like they intentionally worded a misleading description on this product. Any indication of trying to mislead the consumer gets ONE Star in my book.
Oregon Scientific Thermo-Hygrometer with Indoor/Outdoor Display
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