Mini Hygrometer Thermometer 2PCS Mini Digital Humidity Gauge, AikTryee Hygrometer Indoor Humidity Monitor, Temperature Humidity Gauge Meter for Humidors, Greenhouse, Garden, Cellar, Closet, Etc

I wanted a thermometer for upstairs and another for downstairs, but only one consistently works. The other one will occasionally show a reading, but its different from the first one even though they are side-by-side.

I purchased these gauges to keep a watch on the humidity in my guitar cases.

2 units and extra batteries came in the box. Work well, does what its supposed to do.

Purchased a set of two, used a Boveda One-step calibration kit over 24 hours to establish a baseline for both hygrometer readings: (1) Temp read 4 degrees low (displayed 69* to actual 73*); humidity read 3% high (displayed 78% to actual 75%) (2) Temp read 3 degrees low (displayed 70* to actual 73*); humidity read 4% high (displayed 79% to actual 75%) According to the product documentation Temperature measurement accuracy: ±2℉; Humidity measurement accuracy: ±5%RH. These systems were out of spec for temp and within spec for humidity. Im using these in clear plastic containers to store cigars while I reseason my humidors. As a rough guide they work fine, the display is clear and easily readable through the container wall. DONT rely on these as precision instruments though, pickup a more precise hygrometer for a long-term solution. (Xikar makes a nice one that can be calibrated)

I 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.

Works as described. Mine were about 5 degrees off on temperature and humidity. Battery life was meh at about 6 months of 24/7 operation. Decent product for the price. Simple to use and easy to read display.

I have mini glass plant terrariums and hated putting in wired and bulky temp gauges in them. These are simple and they don’t take away from scenery. I’ve had them for a good 2 ish months, I wanted to really see if they’d last more than a week or so. They read very well!

A good bang for your buck, not exactly lab grade equipment (the two units does not quite agree on either humidity or temperature) but good enough for my purpose - checking if my Swamp Cooler will work.

I just wish there was an on/off switch!

Worked and lasted a while