Review on Yosooo Hydroponic Laboratory Electrode Connector by Drew Poulin

The probe is good for the price. Looks and feels like my Bluelab probe. The cable is not very long. The storage lid was empty when it arrived and very cheap. I had to replace the rubber band on the probe with the lid over it to close it but for what you pay I think it works now. It even came in a cool plastic container. The one I got was calibrated but I recalibrated with BlueLab 7 and 4 calibration solution. The pH is fairly accurate, but it will drift (0.1 or 0.2) after a few minutes in solution, but it will read right the first time, but for continuous reading it won't work. I agree as I keep my hydroponic water at pH 6.0. I have this as a backup, my Bluelab pH probe is glass and if something happens to it I can still use it to check my pH. ; It also reads the temperature of the water, which stays the same no matter how long the probe stays in solution. I say if you need an extra probe it's good but not great. I would still recommend them. You can use tap water to know when the sensor is off. My tap water usually has a reading of 8.1. So if it's off at 0.3 I know it's time for a recalibration.