... The PHS series Precision pH/mV meter, ideal for routine use in schools, laboratories and production plants,is capable of measuring pH/mV ... selective electrode.There are four models of PHS series precision PH Meters,PHS-25,PHS-25C,PHS-2C,PHS-3C.Features In the back of the ... Display) withsimultaneous display of the measured values( , pH/mV) is easy to read. PHS-2CResolution & Accuracy: ±0.02pHmV Range: 0 ...