Hanna Benchtop pH/mV Meter with CAL Check

The HI2221 is an affordable pH/mV benchtop meter that features automatic pH calibration up to five-points that can be performed using seven standard buffers. All pH measurements are compensated for temperature effect automatically with the supplied HI7662 temperature probe.


  • Simple User Interface - on a large, clear display.
  • CAL Check™ - Hanna’s exclusive CAL Check™ diagnostics system ensures accurate pH readings every time by alerting users of potential problems during the calibration process. 
  • Automatic Calibration - Automatic pH calibration can be performed at up to 5 points 
  • GLP Data - including date, time, standards used, offset, and slope can be accessed when the instrument is in pH measuring mode
  • Manual or automatic temperature compensation of pH measurements over a wide range from -20.0 to 120.0°C
  • mV mode - that can be used with ORP electrodes and for relative mV readings.
  • Stability Indicator
  • Data Logging - The log-on-demand feature allows up to 100 data points to be recorded.
  • Data Transfer - Data can be transferred to a PC with a USB cable and HI92000 software (both sold separately)


pH Range: -2.0 to 16.0 pH
pH Resolution: 0.01 pH
pH Accuracy: ±0.01 pH
pH Calibration: automatic, up to five point calibration with seven standard buffer available (pH 1.68, 4.01, 6.86, 7.01, 9.18, 10.01, 12.45)
pH Temperature Compensation: Manual or Automatic from -20.0 to 120.0°C (-4.0 to 248.0°F)
pH CAL Check: (electrode diagnostics) Yes
pH Input: impedence 1012 Ohm
mV Range: ±699.9 mV; ±2000 mV
mV Resolution: 0.1 mV (±699.9 mV); 1 mV (±2000 mV)
mV Accuracy: ±0.2 mV (±699.9 mV); ±1 mV (±2000 mV)
Meter Temperature
Temperature Range: -20.0 to 120.0°C (-4.0 to 248.0°F)
Temperature Resolution: 0.1°C
Temperature Accuracy: ±0.2 °C (Excluding probe error)
General Meter
Logging Memory: log-on-demand up to 100 records
Connectivity: opto-isolated USB
Power Supply: 12 VDC adapter
Environment: 0 to 50°C (32 to 122°F); RH max 95% non-condensing
Dimensions: 235 x 222 x 109 mm (9.2 x 8.7 x 4.3”)

HI2221 is supplied with HI1131P pH electrode, HI7662 temperature probe, HI76404N electrode holder, HI70004 pH 4.01 buffer solution sachet, HI70007 pH 7.01 buffer solution sachet, HI7071S electrolyte solution, HI700661 cleaning solution sachet, 12 VDC adapter, and instructions.

Manufacturer : Hanna Instruments

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Cat.#Mfg.#PriceQuantityEstimated Availability
640-100-45HI 2221-X$666.75 EA  
Ships within 2 weeks

Parts & Accessories:

Cat.#DescriptionMfg.#PriceQuantityEstimated Availability
639-200-19Temperature ProbeHI 7662$99.75 EA  
Ships within 2 weeks

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