5" Indoor Outdoor Hygrometer/Thermometer, Humidity Gauge Indicator Temperature Humidity Monitor, Analog Hygrometer Humidor (English Version)

Having been looking around for a moisture meter I noticed that what I saw was either too small and cheap looking or of the digital battery operated type. I wanted a big analog one, and I was pretty sure that I would have to settle for plastic. I was about to give up when I came across this guy. 1. It is brushed aluminum ( matches my big thermometer) a huge point on the plus side. 2. It is 5" plus diameter, easy to read at a distance. 3. A colorful and practical dial. 4. To my amazement it did not need to be adjusted. Both its little thermometer and its big moisture hands came spot on. I keep it out in the screened in porch and easily check out the mornings humidity while I walk by the window. I am quite happy with this . . . tool. It is a handsome thing. Get one before everything goes plastic..

Summary: 4-way comparison of different hygrometer models.Evaluation: Two main focus areas: 1) Is it accurate, and 2) can it be adjusted. For the accuracy, I adjust all of the hygrometers outdoor at 90% relative humidity, and then took them inside, and they all tracked to 60%, except for unit #4, which remained at 80%. So three tracked together, and I deemed those "relatively accurate".Unit #1: 5" Hygrometer Thermometer Indoor Outdoor [UPDATED English Version], Humidity Gauge Indicator Temperature Humidity Monitor, Analog Hygrometer Humidor for Patio, Wall Decorative, Room, Home, OfficeRank: 1stPros: a) easy to read dial, b) relatively accurate, c) reading updates quickly, d) adjustableCons: Nonehttps://smile.amazon.com/gp/product/B07LD3PBNKUnit #2: 75mm Round Cigar Oasis Analog Hygrometer Cigar Hygrometers Cigar Hygrometer Round Cigar humidor HygrometerRank: 2ndPros: a) fairly easy to read, b) relatively accurate, c) adjustableCons: Nonehttps://smile.amazon.com/gp/product/B07H8CQVCNUnit #3: Lockdown Vault HygrometerRank: 3rdPros: a) relatively accurateCons: a) adjustment requires disassemblyhttps://smile.amazon.com/gp/product/B004RQWLAAUnit #4: Cigar Oasis Analog Hygrometer by Western HumidorRank: 4thPros: NoneCons: Not accurate, relative to three other units.https://smile.amazon.com/gp/product/B00JXOKPT0

The Uppon hygrometer looks really nice and seems to be accurate. I like the colored zones on the humidity scale. They make it easy to see if the humidity levels are good or not.A thermometer is included, which is nice, but the Fahrenheit scale is not very useful. The Celsius scale is on the top with normal temperature intervals (10, 20, 30, etc). The Fahrenheit scale is underneath that, but it uses the same scale as the Celsius temperatures on top. So the intervals between Fahrenheit temperatures are very awkward. For example, it jumps from 68 to 86. If the temperature is somewhere between these numbers, it's impossible to know precisely what the reading is. They should have put a separate Fahrenheit scale on the thermometer like almost all other F/C thermometers. I took away one star for this flaw. The primary function of the device (hygrometer) is great!

Regardless of whether it was calibrated before leaving manufacturer, it has been bounced around in boxes, by forklifts, in containers in ships, by cranes, in warehouses, in trucks and probably more than once by the classic "savage baggage handler." I do not fault the gauge for being off when first opened.I did the salt/water calibration. (1/2 cup table salt; 1/4 cup water; sealed container/bag; stable temperature) Search this process if you are unfamiliar with it.I had to adjust the gauge iteratively. I found small adjustments did overshoot when the gauge was allowed to stabilize again. I finally called it good enough and it is mighty close. I'm an engineer and wanted it perfect, finally had to admit to myself that this is not a lab instrument so do not expect it to be one!The thermometer is adjustable as well. I found it accurate out of the box and did not need adjustment.The relative humidity is large and easily read. The temperature dial is small and not easily read, but I didn't purchase this as a thermometer.The main body is metal, stainless I think. The lens is glass (I tried to scratch and whatever it is is much harder than most plastics.) The stand/foot is plastic and is attached with a phillips head screw.I like the gauge and will buy another one for in the house. The one I bought is outdoors. It is stable on its stand/foot and it does have a keyhole slot to hang (after removing the stand.)

Accurate and works well. Easy to calibrate if needed.