Conductivity-TDS-Salt Meter

ITEM # DCM7021

Conductivity-TDS-Salt Meter

The #DCM7021 has the features and specs needed for most field work. For example, it can measure ambient temperatures as high as 194°F (90°C).


Best For:



  • Measures and displays conductivity, total dissolved solids (TDS) and salt concentrations, and ambient temperature
  • Automatic temperature compensation (ATC)
  • Min/max memory + data hold
  • °F/°C switch
  • IP-57 waterproof (it floats)
  • One-button calibration
  • Small and lightweight
  • Auto power off
  • Specifications


    • Measurement ranges: 0 to 2000 μS (MicroSiemens) and 2 to 20 mS (MicroSiemens) for conductivity; 0 to 1300 ppm and 1.3 to 13 ppt (parts per thousand) for TDS; 0 to 1000 ppm and 1 to 12 ppt for salt; 32° to 194°F (0° to 90°C) for tem
    • Measurement accuracies: ±2% of full-scale value for conductivity, TDS and salt; ±(0.4°F/0.2°C + 1 digit) for temperature
    • Measurement resolutions: 1μS/0.01mS for conductivity; 1ppm/0.01ppt for TDS and salt
    • Auto power off: After 10 minutes of inactivity
    • Weight (with batteries): 4.8 oz. (135g)
    • Power source: Four "AAA" batteries (included)


    • 1413 μS/cm standard conductiivity solution
    • Custom hard plastic carrying case
    • 1-year limited warranty


    • 7.7 x 1.6 x 1.4 in. (195 x 40 x 36mm)
    Prop 65

    ⚠ WARNING: This product can expose you to chemicals including di2-ethylhexylphthalate (DEHP), which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to