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Hanna Instruments Canada
Customer Support: (800) 842-6629

GroLine® Nutrient Tester EC/TDS - HI98330


In stock

The HI98330 nutrient tester is designed to measure the conductivity of the nutrient solutions used in agriculture and hydroponic applications.




Ideal for hydroponics and agriculture applications, the HI98330 GroLine® Nutrient Tester accurately measures the electrical conductivity (EC) in mS/cm and the total dissolved solids (TDS) conversion in parts per million (ppm) of the nutrients in water.

Suitable for plants that need a higher EC, the tester features an extended range up to 6.0 mS/ cm (EC), 3000 ppm (500 ppm scale), and 4200 ppm (700 ppm scale).

The IP67 waterproof rated and floating casing houses the EC graphite electrodes and temperature sensor, and is suitable for stirring and testing simultaneously.

  • IP67 waterproof and floating design
  • No user calibration needed
  • Auto-on when placed in liquid
  • Auto-off 30 seconds after stable measurement
  • Rugged and doubles as a stirring stick Low battery indicator
  • Readings displayed by 24 brightly lit LED lights
  • Conductivity scales and operational instructions printed on the tester body
  • Easy to clean (detachable crown-shaped cap)


Primary Applications:

Agriculture, hydroponics, irrigation water

Ordering Information:

HI98330 is supplied with quick reference guide with instrument quality certificate.

Additional information

Weight 4.22 kg

Conductivity/TDS, Nitrate, Temperature


SKU HI98330
Name GroLine® Nutrient Tester EC/TDS – HI98330
EC Range 0.2 to 6.0 mS/cm
EC Resolution 0.1 mS/cm (0.2 to 4.0 mS/cm)
EC Resolution 0.25 mS/cm (4.0 to 6.0 mS/cm)
EC Accuracy ±4 % of reading ±1 resolution point
TDS Range 100 to 3000 ppm (500 ppm scale)
TDS Range 140 to 4200 ppm (700 ppm scale)
Resolution 50 ppm (100 to 2000 ppm)
Resolution 125 ppm (2000 to 3000 ppm)
Resolution 70 ppm (140 to 2800 ppm)
Resolution 175 ppm (2800 to 4200 ppm)
Accuracy ±4 % of reading ±1 resolution point
Calibration Factory calibrated
Probe Graphite sensors in ABC + PC body
Temperature Compensation Automatic from 5.0 to 50.0 °C (41.0 to 122.0 °F)
Battery type 3×1.5V AA alkaline
Battery life Approx. 3 years (10 measurements/day)
Measurement display 24 blue LEDs
Environment 0 to 50 °C (32.0 to 122.0 °F)
Dimensions 444 mm (17.48 in.)
Dimensions Ø 30 mm (1.18 in.)
Weight with batteries 265 g (9.3 oz.)
Casing protection IP67, floating


GroLine® Nutrient Tester EC/TDS – HI98330