ExStik II Conductivity/TDS/Salinity/Temperature Kit The Extech EC400 ExStik features six units of measure (µS/cm, mS/cm, ppm, ppt, mg/L, and g/L), internal memory that stores up to 15 labeled readings for easy recall, adjustable conductivity to TDS ratio factor from 0.4 to 1.0, 0.5 fixed salinity ratio, and self-calibration upon power up. Additional Features Incorporating the latest microprocessor chip and patented sensor technologies to enable the simultaneous measurement of Conductivity, TDS, Salinity, and Temperature, the EC400 provides the flexibility of interchangeable cell constants and has made the job of testing fast, accurate, and repeatable. The EC400 is also waterproof to IP57 for use in wet environments and floats if dropped in liquid. Includes The kit comes with the EC400 ExStik Conductivity/TDS/ Salinity/Temperature Meter, with EC405 sensor, protective cap, 84μS/cm, 1413μS/cm and 12880μS/cm calibration standards (30mL bottle each), a weighted base, three sample plastic cups with caps, four 3V CR-2032 batteries, a 48" (1.2m) neckstrap, and a carrying case. Applications Wastewater and drinking water analysisEnvironmental tests to determine the health of ponds, streams, wells, and other bodies of waterManufacturing processes such as component or PCB rinsing