Digital Portable pH-Conductivity-TDS Meter

The Hanna HI 991301 offers you the combination of pH, electro-conductivity, total dissolved solids and temperature. To increase precision, you can select the meter which will work best with your range of conductivity, from purified to brackish waters. There are only 2 buttons, yet you can select from a range of calibration buffers and even the temperature scale (°C or °F) most familiar to you. The housing is waterproof and rated for IP 67 conditions. The multi-parameter probe, HI 1288, includes pH, EC/TDS and temperature in one convenient, rugged handle. Other user selectable features include different TDS factors from 0.45 to 1.00, and a range of temperature coefficients from 0.0 to 2.4% for greater consistency and reproducibility. Also selectable are standardized buffer recognition values. To ensure against interference from transient electrical noise, a solid-state amplifier is integrated into the probe.
Range pH 0.00 to 14.00 pH
Range EC 0.00 to 20.00 mS/cm
Range TDS 0.00 to 10.00 ppt (g/L)
Range Temperature 0.0 to 60.0°C (32.0 to 140.0°F)
Resolution pH 0.01 pH
Resolution EC 0.01 mS/cm
Resolution TDS 0.01 ppt
Resolution Temperature 0.1°C (0.1°F)
TDS Conversion Factor selectable 0.45 to 1.00 with 0.01 increments (default 0.50)
pH Calibration automatic at 1 or 2 points with 2 sets of memorized standard (pH 4.01/7.01/10.01 or 4.01/6.86/9.18)