EC Meter 4 in 1 Waterproof ExStik EC400 EC Meter 4 in 1 Waterproof ExStik EC400 Conductivity/TDS/Salt/Temp Meter Waterproof ExStik Conductivity/TDS/Salinity Meter One high accuracy multi-range sensor measures four parameters (Conductivity, TDS, Salinity and Temperature) Autoranging meter offers 3 ranges to measure from pure water to salinity solution to waste, boiler and cooling water using the same conductivity cel 6 units of measure: µS/cm, mS/cm, ppm, ppt, mg/L, and g/L Internal memory stores up to 15 labeled readings for easy recall Adjustable Conductivity to TDS ratio factor from 0.4 to 1.0 Self calibration on power up