ADWA AD31 Professional Waterproof Conductivity-TDS-Temperature Pocket Tester with replaceable probe


Automatic temperature compensation; Range(EC): 0 to 3999 µS/cm; Accuracy(EC): ±2% f.s; Range(TDS): 0 to 2000 ppm; Accuracy(TDS): ±2% f.s

  • Parameters: EC(Conductivity), TDS, Temperature


AD31 is a waterproof Conductivity, TDS and temperature tester. The housing has been completely sealed against humidity. All Conductivity and TDS readings are automatically temperature compensated (ATC), and temperature values can be displayed in °C or °F units. The Conductivity/TDS conversion factor (CONV) can be selected by the user, as well as the coefficient ß (BETA) for temperature compensation. The instrument can be calibrated at one point. Measurements are highly accurate with a unique stability indicator right on the LCD. The models are also provided with a low battery symbol which warns the user when the batteries need to be replaced.

Conductivity (EC) Specifications

EC Range

0 to 3999 μS/cm

EC Resolution

1 μS/cm

EC Accuracy

±2% f.s.

EC Calibration

Automatic, 1 point

Temp. Compensation


TDS Specifications

TDS range

0 to 2000 ppm

TDS Resolution

1 ppm

TDS Accuracy

±2% f.s.

TDS Calibration

Automatic, 1 point

Temp. Compensation


Temperature Specifications

Temperature Range

0.0 to 60.0°C / 32.0 to 140.0°F

Temperature Resolution

0.1°C / 0.1°F

Temperature Accuracy

±0.5°C / ±1°F

°C / °F


Additional Specifications


AD32P replaceable EC/TDS/Temperature electrode (included)

Battery Type / Life

4 x 1.5V Button type / Approx. 100 hours


175.5 x 39 x 23 mm


100 g

Ordering Information

Adwa AD31 is supplied with AD32P - EC/TDS/Temperature probe; AD70031 - 1413 μS/cm calibration solutions in sachet (20 ml); Protective cap; Clip holder; Wrist strap; Batteries (4 x 1.5, button types); Instruction manual


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