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  • hanna-hi98131-groline-hydroponic-waterproof-pocket-ph-ec-tds-temperature-tester
  • hanna-hi98131-groline-hydroponic-waterproof-pocket-ph-ec-tds-temperature-tester
  • hanna-hi98131-groline-hydroponic-waterproof-pocket-ph-ec-tds-temperature-tester
  • hanna-hi98131-groline-hydroponic-waterproof-pocket-ph-ec-tds-temperature-tester
  • hanna-hi98131-groline-hydroponic-waterproof-pocket-ph-ec-tds-temperature-tester

Hanna HI98131 GroLine Hydroponic Waterproof Pocket pH/EC/TDS/Temperature Tester


As per Hanna





100% BUYER


  • Specifications




pH Range

0.00 to 14.00 pH

pH Resolution

0.01 pH

pH Accuracy

0.1 pH

pH Calibration

automatic, at one or two points using standard buffers (pH 4.01, 7.01,10.01); one point calibration using quick calibration solution

pH Temperature Compensation


EC Range

0.00 to 6.00 mS/cm

EC Resolution

0.01 mS/cm

EC Accuracy

2% F.S.

EC Calibration

automatic, one-point at 1.41 mS/cm or 5.00 mS/cm; one point calibration using quick calibration solution

TDS Range

0 to 3000 ppm (500 CF); 0 to 3999 ppm (700 CF)

TDS Resolution

10 ppm (mg/L)

TDS Accuracy

2% F.S.

TDS Calibration

done through conductivity

EC/TDS Temperature Compensation


EC to TDS Conversion Factor

0.5 (500 ppm) or 0.7 (700 ppm)

Cell Type

amperometric two pole

Temperature Range

0.0 to 60.0C / 32.0 to 140.0F

Temperature Resolution

0.1C / 0.1F

Temperature Accuracy

0.5C /1F

Automatic Shut-Off

auto-off after 8 minutes of non-use

Battery Type/Life

1.5V (4) / approx. 100 hours of continuous use


0 to 50C (32 to 122F); RH max 100%


163 x 40 x 26 mm (6.4 x 1.6 x 1.0)


100 g (3.5 oz.)

Ordering Information

HI98131 is supplied with HI73127 pH electrode, HI73128 electrode removal tool, batteries (4), instructions and quality certificate.

  • Waterproof and floats in water, designed for the humid growing environment
  • Wide pH range of 0.00 to 14.00 pH
  • Automatic Temperature Compensation (ATC), displays temperature in °C or °F
  • Large LCD displays stability indicator, low-battery indicator, and calibration tags
  • HOLD button for easier measurement recording
  • Battery Error Prevention System (BEPS) with three automatic shutoff settings
  • Battery % level at startup
Product Description

The HI98131 measures pH, conductivity (EC), total dissolved solids (TDS) and temperature with selectable EC to TDS conversion factor. The pH readings are displayed with a 0.01 resolution and with an accuracy of ±0.05 pH. EC and TDS readings are displayed with a 0.01 mS/cm and 10 ppm (mg/L) resolution and 2% full scale accuracy. The EC range of the HI98131 is from 0.01 to 6.00 mS/cm and TDS is from 0 to 3000 ppm using a 0.5 conversion factor or 0 to 3999 with a 0.7 EC to TDS conversion factor.

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