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flatula
> 3 dayI bought the Travel Humidor Plastic Pouches as well. I put one Hydrometer inside the Pouches and sealed it and the other one ( because I bought the Two Pack ) outside on my desk. The one on inside is working nicely and the one outside of the Pouch is measuring the Humidity exactly as my expensive Humidity/ Barometer that I have on my desk as well. Nice Little Unit.
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Emily
> 3 dayI got a 2 pack of these because my incubator was not displaying the correct humidity. I read all the hit-or-miss reviews and decided to risk it. Yeah, that was a mistake. On one hand, these are closer to the truth than the incubator (which still reads 20% humidity, obviously wrong). On the other hand, the temperatures are wayyyy off. That is pretty dangerous in an egg incubator. I used my instant read thermometer to compare because I was confused why, after two hours, they were still getting drastically different readings. I’m glad I did because it showed that my incubator was NOT running cold (like I thought it was, after using the sensor on the left for a few days), and was actually hotter than it should’ve been. I put this second sensor in to be sure of the temperature before making adjustments, and that’s when I discovered they are radically off. I find this strange because when they sat at my room temperature they displayed properly, but in the incubator they are inconsistent. I don’t have $20 for better sensors, but I’m mad I even wasted $6 on these. Save your money.
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Jae Johnson
> 3 dayGreat little way to keep track of enclosures temperature, it’s easy to install, easy to read and maintain a good time period fit battery life.
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Red
> 3 dayWorks for what I am using it for. (Monitoring 3D printer Filament in storage).
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ALEX
> 3 dayI think these are all made in one big factory in china, that said I ordered 2 and there was a 3 point difference in one of them, I did a hygrometer test ( google it) and figured out which one was off so I just add 3 to it and get the correct humidity. These are all a plus/or minus thing
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Dylan
> 3 dayWorks great for a while but then the screen went out so I tried changing the batteries and that didn’t fix it so I just bought them again and the new ones screen went out too so I might not be purchasing again but while it worked it worked great
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Rodger S.
Greater than one weekOrdered twice at different times, four pieces total. All placed in a sealed container at the same time. After twenty four hours- Relative humidity readings dead on with each other - 70%. Temperature readings within 0.4 degrees, three reading 73.0 degrees, and the fourth reading 73.4 degrees. Conventional thermometers included in the same container read 73.1 and 73.4 degrees. Thats pretty good accuracy/repeatability considering that the units cost less than $2.50 each. For all those complaining about accuracy/repeatability, what do you expect for less than $2.50 each. Youll be spending substantially more for units that use a more accurate sensor and are individually calibrated to give more accurate readings.
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Mytwocents
> 3 dayI got this to go in my guitar case. I had alternately been over-humidifying and under-humidifying, neither of which was ideal. Where to mount it so that it wouldnt rattle around? I decided to wedge a piece of plastic from a notebook cover into the area near the storage box of the case. Then I used Velcro to attach the humidifier to the plastic, so that I could get if off to change the batteries. Good luck.
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Haven
> 3 dayThese work well, are small and unobtrusive, and come with batteries.
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R. Stein
> 3 dayThey are very accurate for the price.