Review on 🌡️ Extech 445580: Pocket-Sized Humidity and Temperature Meter with Clip-On Design by Jennifer Mounce

I had this $150 replacement hygrometer that I can calibrate myself. I like to take 3 meters and let them stabilize for 20-30 minutes and see if the RH% is within a few dots. Accurately measuring relative humidity is MUCH more difficult than measuring temperature. If you have to measure the relative humidity for your work, you need at least 2 meters. I found the pen style comfortable, but the relative humidity sensor stopped calibrating in less than a month. I have measured 55-57% relative humidity with two other meters but this pen reads 65%. That's a big difference. Now it's on my table.