EC testers

Conductivity Tester

The EC tester comes in two models: a high range and low range model.

Edaphic Scientific supplies low cost, high accuracy, and easy to use, electrical conductivity (EC) testers for research, water quality, soil science, agriculture, horticulture, aquariums, teaching and students.

  • Waterproof and it floats!
  • High accuracy
  • Automatic calibration and temperature compensation
  • HI98331 model specifically designed for soil measurements
  • BEPS (Battery Error Prevention System)


Our EC testers provide ease of use and affordability making it the standard in EC and TDS measurement.

Our testers includes features such as: a replaceable graphite electrode, adjustable TDS ratio, °C or °F measurement, Automatic Temperature Compensation (ATC) with adjustable β, battery level indicator, stability indicator, automatic shut-off and automatic calibration.

The graphite conductivity electrode provides greater accuracy because it resists contamination by salt deposits in the sample.

All of these features are packed in a floating, waterproof casing. This 3-in-1 tester is unmatched in EC/TDS/ temperature measurements.


Soil Salinity Sensor

The EC tester for soils is specifically design for direct soil solution EC and temperature measurements.

EC tester models
  • HI98311 – Low range, EC tester (0 to 3999 µS/cm)
  • HI98312 – High range, EC tester (0.00 to 20.00 mS/cm)
  • HI98331 – Soil EC tester


  • Range: Low range: 0 to 3999 µS/cm; High range: 0.00 to 20.00 mS/cm; Soil: 0.00 to 20.00 mS/cm
  • Resolution: 0.01 µS/cm; 0.01 mS/cm
  • Accuracy: ±2% of full scale


brochures and manuals

EC Tester Manual

EC Tester for Soils Manual