"bench-top instrument capable of measuring conductivity (EC), resistivity and total dissolved salt (TDS). Large LCD display, computer connection via USB port Measurement methods: simple (basic) with or without GLP data, real-time graph representation, data recording mode. Calibration: In the case of conductivity, one or four-point, automatic or individual calibration is possible based on standard and individual values. Single-point salinity calibration (%). Temperature compensation: Automatic, between -20.0 and 120.0 °C. GLP (Good Laboratory Practice) data is available at the click of a button. The instrument stores the date and time of the calibration, the buffers used, and the offset and slop value of the electrode. per data group max. 50,000 data can be saved and copied to the computer using a USB cable and the HI92000 software (not included). Adjustable sampling interval. Four-Ring Conductivity Probe: The HI76312 four-ring probe has a built-in temperature sensor. The four rings are made of platinum, while the body of the probe is PEI plastic, which is resistant to most chemicals. During the conductivity measurement, the following parameters can be set individually: temperature compensation coefficient, reference temperature, compensation mode, cell constant and TDS conversion factor. Measuring range: EC value: 0.000-9.999 ?S/cm, 10.00-99.99 ?S/cm, 100.0-999.9 ?S/cm 1.000-9.999 mS/cm, 10.00-99.99 mS/cm, 100.0-1000.0 mS/cm TDS value: 0.000-9.999 ppm, 10.00-99.99 ppm, 100.0-999.9 ppm 1,000-9,999 ppt, 10.00-99.99 ppt, 100.0-400.0 ppt Temperature: between -20.0 and 120.0 °C, between 253.15 and 393.15 K Accuracy: EC value: ±1% of the measured value (±0.01 ?S/cm) TDS value: ±1% of the measured value Temperature: ±0.2 °C, ±0.2K Dimensions: 231mm x 94mm x 160mm Weight: 1.0 kg Accessories: EC probe, electrode holder, mains adapter and instructions for use"