Review on Reddragon Humidity Testing Moisture Detector - Building Measurement & Inspection by Fred Griffin

Waste of money. First of all, he rarely works, I strictly follow the instructions, but he just doesn't want to testify 90%. I keep putting it on the floor and it just won't read and I keep trying and sometimes it takes over 5 minutes to get a reading. I know what the numbers read mean, but don't you think they should contain information on how to read the numbers that the machine returns? When I first got it working I had no idea what it meant, but luckily an internet search gave me a translation to accompany this piece of hardware. This device is junk, just doesn't work, waste of money.