Stay in Control of Indoor Climate: Ambient Weather WS-03-3 Compact Temperature and Humidity Monitor, 3 Pack Review

I've been using it for quite a while, no serious problems. Humidity at very low humidity levels is clearly inaccurate, over 30% seems pretty close. The temperature is pretty accurate.

I've had them for a few months now and they seem to be working. I tested them by putting them in rooms, writing down information, then swapping and writing again. Your sensors are fine-tuned.

Simple and precise. It only provides temperature and humidity, which is what I wanted. I checked the accuracy of the humidity measurement with a water and salt test in a plastic bag (Google tests humidity sensors). It turned out to be within 0.5% of ideal, which is more than enough to control humidity in my home.

All 3 devices provided temperature and humidity readings with an accuracy of 1 degree or 1%. The temperature readings were consistent with an Accurite device and another brand I own. However, the humidity readings for all three were 10% higher than my other two devices. I would expect a few% difference but not 10%!

These little guys are perfect to place in different rooms of the house. Easy to read, use standard alkaline batteries, do not invert. The 3-piece set was the right number for me at a good price. But the best part is that they don't try to cram too much information into the display - just temperature and humidity. Most other devices on the market are huge and try to do too much. These little guys are just right.

The readings of three of these differ too much from each other - for example about 5 percentage points for the humidity. The temperature can't be changed to Celsius, which sucks, but live with it; but it says it's 75ºF and outside with the window open it's 55ºF. I don't agree that we're so hot inside. You can still use the product as a (weak) estimate of the humidity trend though, hopefully it's internally consistent.

These humidity and temperature gauges appear to work well. I bought a set of three so I could have a chance to install them all in the same place to see how consistent they are. They all gave the same humidity and temperature readings. Okay, sometimes one reads one grade higher or lower than the other, but they're close enough for my needs. Only time will tell how long the batteries will last. I bought them for my apartment in Florida. I can install one in the living room, one in the bedroom…