MODEL EQ-631 PH + Potentiometer + Magnetic Stirrer MODEL EQ-632 Portable RECHARGEABLE Battery Operated pH • CONDUCTIVITY • THERMOMETER Useful for field work, water testing, printing industry MODEL EQ-634 pH + Auto-ranging Conductivity Meter + Magnetic Stirrer MODEL EQ-635 pH + Autorange Conductivity Meter for simultaneous measurements Useful for P.G., Research, Industry, Pharma MODEL EQ-636 pH + Potentiometer for simultaneous measurements Useful for P.G., Research, Industry, Pharma MODEL EQ-637 AUTO RANGING CONDUCTIVITY CUM TDS METER with inbuilt magnetic stirrer & standard conductance (useful for titration) Selects the right working range Useful for Under Graduate, Post Graduate, Industry, Titration etc MODEL EQ-6682 pocket conductivity (E.C meter) cum TDS meter with rechargeable battery Pharma, Water analysis, Soil testing MODEL EQ-6612 pocket pH cum conductivity meter (E.C meter) with rechargeable battery. Pharma, Water testing, Printing, Soil testing COMBO Models