Measures conductivity (in a wide range of 0.1 μS to 199 mS), salinity, TDS (total dissolved solids), and temperature. Determine water conditions in boilers, coolers, water conditioning, waste water, photography, environmental testing, aquariums, labs, industrial and quality control. The large LCD shows conductivity, TDS or salinity in large digits with time, date, and temperature (in °C or °F) shown simultaneously on the lower display. Scroll 99 data points directly on the LCD with time stamps, min/max and average readings. Also, features hold, manual or auto range, and ATC (automatic temperature compensation). In order to connect this model to a computer to stream data, you will need the USB Cable (SP-840054) and Data Acquisition Software (SP-840052). Comes in a hard carrying case complete with built in RS232 and DC9V ports, detachable probe with 3½' cord, and 4 AAA batteries. Uses optional AC Adapter (SP-840027). EPA Equivalency Method: 120.1