MODEL EQ-664A AUTO RANGING CONDUCTIVITY 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-660B Microprocessor based with built-in std. conductance & unbreakable stand Useful for U.G., P.G., Research & Industry MODEL EQ-662 POCKET CONDUCTIVITY METER with unbreakable cell battery operated Useful for field work & Chemical Plant, Printing Industry, Agriculture, Water Industry, Fish Farming MODEL EQ-665 CONDUCTIVITY METER with battery backup and built-in standard conductance Useful for areas where there is power failure MODEL EQ-661 CONDUCTIVITY METER with Auto Temperature compensation & thermometer Useful for P.G., Industry, Research, Pharmacy MODEL EQ-667 AUTO RANGING CONDUCTIVITY METER with built-in standard conductance (selects right working range) Useful for P.G. U.G., Industry, Pharmacy DIGITAL CONDUCTIVITY METER (EC METER)