Extech ExStik II Conductivity Meter

The Extech ExStik II Conductivity/TDS/Salinity Meter offers 3 ranges of measurements from tap water to wastewater.


  • Units of measure include μS/cm, mS/cm, ppm, ppt, mg/L, and g/L
  • Automatic temperature compensation of 2% per °C
  • Self calibration of electronics on power up
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The Extech ExStick Conductivity/TDS/Salinity Meter features a high-accuracy multi-range sensor that measures four parameters: conductivity, TDS, salinity, and temperature. The autoranging meter offers 3 ranges of measurements from tap water to wastewater and any aqueous solution. The units of measure include μS/cm, mS/cm, ppm, ppt, mg/L, and g/L.

Data Potential
Adjustable conductivity to TDS ratio is from 0.4 to 1.0 to conveniently calculate the TDS value. The large 2000-count digital display simultaneously displays conductivity, TDS, salinity, and temperature, and uses an analog bar graph to indicate sample trends. The internal memory stores up to 25 labeled readings for easy recall. The conductivity module is easy to replace, and the self-calibration function activates when the meter powers on. Other meter functions include data hold, power off, and low battery indication.

  • Conductivity ranges: 0 to 199.9μS/cm, 200 to 1999μS/cm, 2.00 to 19.99mS/cm
  • Conductivity maximum resolution: 0.1μS/cm, 1μS/cm, 0.01mS/cm
  • Conductivity basic accuracy: ±2% FS
  • TDS ranges: 0 to 99.9ppm (mg/L), 100 to 999ppm (mg/L), 1.00 to 9.99ppt (g/L)
  • TDS maximum resolution: 0.1ppm (mg/L), 1ppm (mg/L), 0.01ppt (g/L)
  • TDS basic accuracy: ±2% FS
  • Salinity ranges: 0 to 99.9ppm (mg/L), 100 to 999ppm (mg/L), 1.00 to 9.99ppt (g/L)
  • Salinity maximum resolution: 0.1ppm (mg/L), 1ppm (mg/L), 0.01ppt (g/L)
  • Salinity basic accuracy: ±2% FS
  • Temperature range: 32° to 149°F (0 to 65°C)
  • Temperature maximum resolution: 0.1°F/°C
  • Temperature basic accuracy: ±1.8°F/1°C
  • Power: four CR2032 button batteries
  • Dimensions: 1.4 x 6.8 x 1.6" (36 x 173 x 41mm)
  • Weight: 3.8oz (110g)
  • (1) ExStick Meter
  • (1) Protective sensor cap
  • (1) Sample cup with cap
  • (4) 3V CR-2032 batteries
  • (1) 48" neckstrap
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Extech ExStik II Conductivity Meter
ExStik II conductivity/TDS/salinity meter
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ExStik II conductivity/TDS/salinity meter, calibration standards, weighted base, 3 sample cups, and carrying case
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