ANALOG DEVICES EVAL-CN0359-EBZ

EVAL-CN0359-EBZ is a completely self-contained, microprocessor-controlled, highly accurate conductivity measurement system ideal for measuring the ionic content of liquids, water quality analysis, industrial quality control, and chemical analysis. A high-performance combination of precision signal conditioning components yields an accuracy of better than 0.3% over a conductivity range of 0.1μS to 10S (10M to 0.1ohm) with no calibration requirements, using either 2- or 4-wire conductivity cells. The circuit automatically detects either 100 ohm or 1000 ohm platinum (Pt) resistance temperature devices in 2-, 3-, or 4-wire configurations, allowing for added flexibility when measuring the temperature of the liquid. The circuit generates a precise AC excitation voltage with minimum DC offset to avoid a damaging polarization voltage on the conductivity electrodes. The amplitude and frequency of the AC excitation is user-programmable.