• Extech EC500   Waterproof ExStik® II pH/Conductivity Meter

Combination flat surface pH electrode with autoranging high accuracy Conductivity cell

The EC500 is Conductivity/TDS/Temperature Meter. Measures 5 parameters including Conductivity, TDS, Salinity, pH, and Temperature using one electrode. Analog bargraph indicates trends. Memory stores up to 25 labeled readings. Waterproof meter with high-accuracy multi-ranging sensor. Features Auto Power off with disable. Complete with meter and electrode, protective cap, sample cup, four 3V CR-2032 batteries, and 48" (1.2m) neckstrap.


  • Measures 5 parameters including Conductivity, TDS, Salinity, pH, and Temperature using one electrode
  • 9 units of measure: pH, µS/cm, mS/cm, ppm, ppt, mg/L, g/L, °C, °F
  • Analog bargraph indicates trends
  • Memory stores up to 25 labeled readings
  • Adjustable Conductivity to TDS ratio from 0.4 to 1.0; 0.5 fixed Salinity ratio
  • RENEW feature alerts user when electrode needs replacement
  • Order Conductivity standards and pH buffers separately
  • Complete with meter and electrode, protective cap, sample cup, four 3V CR-2032 batteries, and 48" (1.2m) neckstrap



Specifications              Range
Conductivity               0 to 199μS/cm, 200 to 1999μS/cm, 2.00 to 19.99mS/cm
TDS/Salinity                0 to 99.9ppm (mg/L), 100-999ppm (mg/L)
                                     1.00 to 9.99ppt
pH                                0.00 to 14.00pH
Temperature             23° to 194°F (-5 to 90°C)
Waterproof               IP57
Memory                     25 datasets
Dimensions               1.4 x 7.3 x 1.6" (36 x 186 x 41mm)
Weight                      3.8oz (110g)


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Extech EC500 Waterproof ExStik® II pH/Conductivity Meter