Sper Scientific 850081 Water Quality Meter

Interchangeable probes- Using interchangeable probes, this versatile meter reads PH, mV, conductivity, TDS, DO temperature and ORP. The user can order probes for only the parameters currently required, and add additional probes in the future. Intelligent probes electronically retain calibration information. No recalibration is required when changing probes. The display simultaneously reads temperature in user selectable °C & °F, and all measurements are automatically temperature compensated. RS232 port enables communication with a computer. Also features auto power off, hold, min/max, fold-out easel back and a tripod screw. Comes with 9V battery and a hard-shell, foam-lined carrying case with room for one or two probes. Dimensions: 8" × 2¾" × 1" (203 × 70 × 25 mm) Weight: 7.2 oz (204 g).