Ultrameter II models deliver performance of ±1% of reading (not merely full scale). This high level of accuracy has been achieved through advanced four-electrode conductivity cell technology, a unique pH/ORP sensor and powerful microprocessor based circuitry. With displayed values of up to 9999, the full four-digit LCD ensures resolution levels never before possible in such affordable instruments. Factory calibrated with NIST traceable solutions, each Ultrameter II may be supplied with both certification of traceability and NIST traceable solutions for definitive calibration.Advanced FeaturesFully automatic temperature compensationUser adjustable temperature compensation (up to 9.99%/°C) which also allows TC to be disabled for applications requiring non-compensated readings.User adjustable conductivity/TDS conversion ratio for greater accuracy when measuring solutions not contained in the microprocessor.Auto-shutoff maximizes the life of the single 9V battery to more than 100 hours/5000 tests.Non-volatile microprocessor provides data back-up, even when the battery is changed. This assures all calibrations and memory data will be retained.Multiple ApplicationsIrrigation WaterHydroponicsLaboratoriesHomeland SecurityReverse OsmosisDeionizationWastewaterCooling TowersEnvironmentalDesalinationFountain SolutionsSpecificationsDisplay: 4 Digit Liquid Crystal DisplayDimensions: 196 x 68 x 64 mm/LxWxH 7.7 x 2.7 x 2.5 inchesWeight: 352 g/12.4 oz.Case/conductivity cell material: valox*pH/ORP: 1,2 ml/0.04 oz.Cell capacities: pH/ORP: 1,2 ml/0.04 oz.Power: 9V alkaline batteryBattery life: >100 hours(5000 readings)Operating/storage temperature: 0 “ 55°C/32 “ 132°FProtection ratings: IP67/nema 6; Waterproof to 1 meter/3 feet ConductivityTDSResistivityTemperatureRanges0-999 uS/cm10-200 mS/cm in 5 auto ranges0-9999 ppm10-200 pptin 5 auto ranges10 KΩ-30 MΩ0-71 C32-160 FResolution0.01 (