HI-9812-0 is an easy to use portable instrument for field measurement of pH, conductivity and TDS in water conditioning applications. This powerful instrument reduces your necessary tool set for field water quality analysis. HI-9812-0 measures pH from 0.0 to 14.0. This meter also checks conductivity and TDS from 0 to 1990 mg/L, ideal for the water conditioning field. Calibration has been simplified to one point for both pH and conductivity/TDS modes.HI-9812-0 is equipped with Automatic Temperature Compensation to remove the effects of temperature on your conductivity and TDS measurements. In addition, the BEPS (Battery Error Prevention System) will alert the user when low batteries could affect the readings.HI-9812-0 uses Hanna Instruments 4-in-1 replaceable HI-1285-0 probe. No probe changes are required when switching your measured parameter between pH, conductivity and TDS.The specially engineered pH electrode also features a fiber junction and gel electrolyte for faster response and reduced contamination.HI-9812-0 is supplied complete with pH/EC/TDS probe, HI-1285-0 with 1m (3.3') cable, pH 7 calibration (1 x 20ml), 1382 ppm and 1413 us/cm calibration solutions (1 each), cleaning solution (2pcs), blue protective case, battery and instructions.