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Thornton conductivity sensors are industry standards for determining water purity and solution concentration. Smart conductivity sensors are a key part of the 770MAX Multiparameter Analyzer/Transmitter measuring system. Each sensor includes data stored in its non-volatile memory which is communicated to the instrument as soon as it is connected. Data includes measurement identification, cell and temperature calibration constants, date of last calibration, serial number, etc., to provide especially fast, simple and reliable startup and documentation. In addition, all wiring is conveniently handled through connectors. Thornton ISO9001 factory calibrations are NIST and ASTM traceable using Thornton's unique ultrapure autoloop calibration system. High installed accuracy is supported through four-wire measurement technology for both conductivity/resistivity and temperature. USP pharmaceutical water monitoring requirements are met by 233-series sensors which provide accurate conductivity and temperature measurement. 316L Tri-Clamp mounting sensors have a Roughness Average (Ra) of 8 microinch surface finish. 234- Series four-electrode sensors are ideal for monitoring clean-in-place (CIP) solution concentrations.