Review on Hanna HI 98107 Precision Instrument by Jim Bethea

I've been using this product for a few months. At first it seemed normal, and in fact it still seems normal now because when you put it in the calibration solution, it's always close. But when you measure the water, it turns off completely. I discovered this the hard way, I couldn't figure out what the problem was until I tested the water with a PH batter. It read all sorts of nonsense, crap like that. Don't waste your money, I wish I had just gotten one of the more expensive ones to start with. I had 2 cheap ones and both didn't work.