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

Very useful and accurate without the digital frills.. 5 star product

Much better than my old electric hygrometer. Keep in my guitar room to monitor my humidifiers output.

It's getting harder and harder these days to find devices that aren't over-engineered to the point of absurdity. It seems everything needs to be hooked up to your phone via Bluetooth, and needs to be controllable solely via an app of dubious quality and provenance. For the average hydroponic farmer, the last thing you want is to carry your phone into your grow area - hydroponics and delicate electronic devices don't mix. There are other reasons not to use apps, of course, but anyone with an IQ above room temperature is already well-informed about that aspect. Enter this device. No setup, no batteries, no app install, no fiddling around. Just take it out of the box and you now have the power to tell the humidity and temperature at a glance. The large size means you can read it all the way across the room, even through your plants if they're not too bushy. Construction seems fairly solid, though time will tell. I don't have another hygrometer that I can compare it to for accuracy, but the temperature is within one degree Celsius of my infrared thermometer. As I change the humidity in my setup, the hygrometer responds as expected. Overall, highly recommended.

Works awesome wish I would've bought another.

Excellent product, price and delivery. Thank you and God Bless.

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.)