Hanna Instruments HI99301 Water resistant meter for conductivity (EC, up to 20.0 mS / cm), TDS and temperature

HI99301 Water resistant meter for conductivity (EC, up to 20.0 mS / cm), TDS and temperature

Article number: HI99301
Availability: Out of stock
Delivery time: 4-8 business days
The HI99301 is a rugged, portable EC/TDS and temperature meter housed in a case rated for IP67 conditions. It is supplied with a two-ring conductivity probe to allow for high range EC measurements from 0.00 to 20.00 mS/cm and TDS measurements from 0.00 to 10.00 ppt. All readings are adjusted with Automatic Temperature Compensation (ATC) and users are able to adjust the temperature correction coefficient and TDS factor for accurately compensated measurements.
  • ±2% EC/TDS Accuracy
  • Comes with all the necessary solutions and batteries- everything you need to get started measuring right away.
  • Perfect for water quality testing in manufacturing and environmental industries.


EC Range

0.00 to 20.00 mS/cm

EC Resolution

0.01 mS/cm

EC Accuracy

±2% FS

TDS Range

0.00 to 10.00 ppt (g/L)

TDS Resolution

0.01 ppt (g/L)

TDS Accuracy

±2% F.S.

Temperature Range

0.0 to 60.0°C / 32.0 to 140.0°F

Temperature Resolution

0.1°C / 0.1°F

Temperature Accuracy (@25ºC/77ºF)

±0.5°C /±1°F

EC/TDS Temperature Compensation

automatic, 0 to 60°C (32 to 140°F) with β adjustable from 0.0 to 2.4%/°C with 0.1% step


automatic, one point at 12.88 mS/cm, 6.44 ppt (CONV 0.5)

EC/TDS Factor

adjustable from 0.45 to 1.00 with 0.01 step (default 0.50)


HI76306 EC/TDS probe with internal temperature sensor, DIN connector and 1 m (3.3’) cable (included)

Battery Type/Life

1.5V AAA (3) / approximately 500 hours of continuous use. auto-off after 8 minutes of non-use


0 to 50°C (32 to 122°F); RH max 100%


143 x 80 x 38 mm (5.6 x 3.2 x 1.5’’)


320 g (11.3 oz)

Ordering Information

HI99301 is supplied with HI76306 EC/TDS probe, batteries, instruction manual, and rugged carrying case.


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