DO700 Portable Dissolved Oxygen Meter 9-in-1 Meter with Lab PerformanceApplicationsThe 9-in-1 DO700 Kit measures DO concentration/saturation, pH, mV, Temperature, Conductivity, TDS, Salinity, and Resistivity.Features• Automatic salinity compensation and manual barometric pressure compensation for DO measurements• Waterproof housing (meets IP57)• One button pH calibration (4, 7, and 10pH)• Choice of 3 point pH calibration for better accuracy• One point Conductivity calibration − automatically recognizes8 calibration solutions from USA, Europe and China series• Automatic Temperature Compensation (non-linear compensation for purified water <10μS/cm to improve measuring accuracy)• Memory stores up to 400 readings with series number, measured value and temperature• Large blue backlit dual LCD display• Auto power off saves battery life with disable function• Complete with Dissolved Oxygen probe with 3 membrane caps and DO internal fill solution (30mL), pH/mV/Temperature electrode, polymer Conductivity cell, pH calbration solutions (4, 7, and 10pH), Conductivity calibration solution (1413μS), 2 AA batteries, and hard carrying case