Review on PH/ORP/EC/TDS/Orville digital thermometer for water ML-51 by Erica Bejan ᠌

Most likely, the PH sensor needs calibration or has been in storage for a long time. The instructions suggest changing the PH sensor once a year. Naturally, it cannot be found in the 2022. Pros: In beautiful packaging. Works. There is a set for making control solutions and calibration. Cons: 1) The thermometer works, accuracy + - 0.2 degrees 2) PH measurement is carried out with a deviation of up to 1.0, i. E. shows 72022, and drop tests PH 6.5. The PH value settles down after a few minutes, the drip test is faster. 3) ORP, EC, TDS measures quickly, the indicators do not jump, I assume that it measures one indicator and translates it through formulas into others.