Conductivity/TDS/Resist/Salinity Meter Advanced Serie6



Item no. HI-6321-02

More details

995 €

HI6321 is a streamlined Conductivity/Resistivity/Total Dissolved Solids (TDS)/Salinity/Temperature benchtop meter with a large touch screen display, comprised of a housing and an integrated conductivity measurement module. Compact and easy to operate, the HI6321 includes Hanna’s HI7631233 four-ring conductivity/resistivity/TDS/salinity probe.

Recommended for a wide range of industrial process water applications, HI7631233 provides stable measurements over a wide measurement range and does not require frequent calibrations. An integral temperature sensor measures the process temperature and adjusts the measured conductivity to a reference temperature by applying specialized compensation algorithms:

  • Linear: appropriate when it is assumed that the temperature coefficient of variation has the same value for all measurement temperatures.
  • Standard: appropriate for high-purity water measurements and documented in ASTM Standard D5391-14. This setting should be used for > resistivity measurements.
  • Natural: appropriate for natural ground, well, or surface water (or water with similar composition) in accordance with ISO7888 standard.


  • Measure μS/cm, mS/cm (Conductivity); Ω·cm, kΩ·cm, MΩ·cm (Resistivity); ppm, ppt (TDS); ppt, PSU, % (Salinity) with temperature
  • Application-specific profiles allow quick and direct measurement without the need to update the sensor and system settings
  • Active log during measurement
  • Measurement stability indicator (using the Stability Criteria setting)
  • Reading modes: direct and direct/autohold
  • Temperature compensation can be automatic or set manually
  • Audible and/or alarm messages for measurements outside of predefined limits
  • Galvanic isolation for conductivity measurement


  • Standard single point salinity calibration in 100% salinity standard, with the reading salinity scale set to %
  • Standard single or multiple conductivity calibration with standards
  • Non-volatile memory saves data and settings


  • Data log collection of up to 1,000,000 data points (with time and date stamp)
  • Logging types: manual, automatic, and autohold
  • Sample ID for manual and autohold data

Connectivity Features & Services

  • Transfer logged data to a USB thumb drive
  • Log files that include measurements and calibration data (as .csv file)
  • FTP and email for log export via Ethernet and Wi-Fi connection
  • USB type A for USB stick, keyboard, and printer
  • USB type C for USB stick and PC connection
EC Range 0.000 to 9.999 μS/cm; 10.00 to 99.99 μS/cm; 100.0 to 999.9 μS/cm; 1.000 to 9.999 mS/cm; 10.00 to 99.99 mS/cm; 100.0 to 1000.0 mS/cm
EC Resolution 0.001 μS/cm; 0.01 μS/cm; 0.1 μS/cm; 0.001 mS/cm; 0.01 mS/cm; 0.1 mS/cm
EC Accuracy ±1 % of reading (±0.01 μS/cm)
EC Calibration automatic standard recognition (84.00 µS/cm, 1.413 mS/cm, 5.000 mS/cm, 12.88 mS/cm, 80.00 mS/cm, 111.8 mS/cm) or user standard; single point or multi-point calibration
TDS Range 0.000 to 9.999 ppm; 10.00 to 99.99 ppm; 100.0 to 999.9 ppm; 1.000 to 9.999 ppt; 10.00 to 99.99 ppt; 100.0 to 400.0 ppt; actual TDS (with 1.00 factor)
TDS Resolution 0.001 ppm; 0.01 ppm; 0.1 ppm; 0.001 ppt; 0.01 ppt; 0.1 ppt
TDS Accuracy ±1 % of reading (±0.01 ppm)
Resistivity Range 1.0 to 99.9 Ω·cm; 100 to 999 Ω·cm; 1.00 to 9.99 KΩ·cm; 10.0 to 99.9 KΩ·cm; 100 to 999 KΩ·cm; 1.00 to 9.99 MΩ·cm; 10.0 to 100.0 MΩ·cm
Resistivity Resolution 0.1 Ω·cm; 1 Ω·cm; 0.01 KΩ·cm; 0.1 KΩ·cm; 1 KΩ·cm; 0.01 MΩ·cm; 0.1 MΩ·cm
Resistivity Accuracy ±1 % of reading (±1 Ω·cm)
Salinity Range 0.00 to 42.00 PSU - Practical Scale; 0.00 to 80.00 ppt - Natural Sea Water; 0.0 to 400.0 % - Percent Scale
Salinity Resolution 0.01 for Practical Scale / Natural Sea Water; 0.1 % for Percent Scale
Salinity Accuracy ±1 % of reading
Salinity Calibration 1 point for Percent Scale
Temperature Range −20.0 to 120.0 °C
Temperature Resolution 0.1 °C
Temperature Accuracy ±0.2 °C
EC/TDS Probe HI7631233 four-ring conductivity/ resistivity/TDS/salinity probe
Power Supply DC adapter 100-240AC to 24VDC 2.5A
Environment 0 - 50 °C / maximum 95% RH non-condensing
Dimensions 205 x 160 x 77 mm
Weight Approximately 1.2 kg 
Ordering Information HI6321 is supplied with HI7631233 probe; HI764060 electrode holder; capillary pipette; 24 VDC power adapter; USB-C to USB-A cable; probe quality certificate; quick reference guide with instrument quality certificate.
Warranty 2 years Probe 6 month

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