Hanna Instruments

HALO2 Wireless pH Tester for Field

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The Professional Wireless pH Tester

  • Quickly obtain reliable pH levels 
  • Compact, durable & waterproof casing
  • Built-in temperature sensor
  • Double-junction probe design
  • Chemical-resistant PEI resin body
  • Large LCD display
  • Dual Operating Modes (Standalone or Connected to Hanna Lab App)
  • Automatic pH calibration at up to 3 points (4 points when used with the Hanna Lab App)


With it's compact size, durable chemically-resistant PEI body, built-in temperature senor, and Bluetooth connectivity; the HALO2 makes the perfect tool for ascertaining reliable pH measurements of your system. Its IP65 body keeps it protected from particles, dust, and water ingress so that you can get many years of accurate testing. Readings are displayed on its large LCD screen, which can be viewed from any angle, as well as documented in the Hanna Lab App.

The Hanna Lab App turns a compatible smart device into a full-featured pH meter. Features include: electrode condition, GLP with time-stamp, live-readings, mV resolution, manual temperature compensation, stability criteria, calibration reminder, pH (mV) and temperature alarms, tester ID, and data sharing. The HALO2 can also be used as a stand-alone pH tester, if desired. 

Equipped with everything you need for successful testing right out of the box.



  • Range: 
    • pH:  0.00 to 12.00 pH
    • mV*: pH/mV conversion
    • Temperature**: -5.0 to 70.0°C (23.0 to 158.0 °F)
  • Resolution:
    • pH:  0.01 or 0.1 pH
    • mV*: 0.1 or 1 mV
    • Temperature: 0.1°C (0.1°F)
  • Accuracy: 
    • pH:  +/- 0.05 pH
    • Temperature: +/- 0.5°C (+/- 0.9°F)
  • Calibration: Up to 3 points or 4 points*; Automatic buffer recognition with Standard buffers; Hanna (pH 1.68*, 4.01, 7.01, 10.01) or NIST (pH 1.68*, 4.01, 6.86, 9.18)
  • Temperature Compensation: Automatic (ATC) or Manual (MTC)
  • Electrode: 
    • Body Material: Polyetherimide (PEI) resin
    • Glass: Low Temperature (LT)
    • Junction: Ceramic
    • Reference Cell: Double, Ag/AgCl
    • Electrolyte:  Gel
    • Tip/Shape: Dome
    • Outer Diameter: 12mm (0.47")
    • Length: 100mm (3.9")
  • Environment: 0 to 50°C (32 to 122°F)
  • Battery Type: 3V Lithium - CR2032
  • Battery Life: Approx. 1000 hours (500 hours with Bluetooth enabled)
  • Dimensions: 51 x 175 x 21 mm (2.0 x 6.9 x 0.8")
  • Weight: 50 g (1.8 oz.)
  • Casing: IP65 ingress protection

*Available with Hanna Lab App

**Measuring outside the recommended operating temperature range may damage the gel electrolyte


What’s Included?

  • (1x) HI9810422 Wireless pH Tester 
  • (2x) pH 4.01 buffer solution, 20mL sachet
  • (2x) pH 7.01 buffer solution, 20mL sachet
  • (2x) Electrode cleaning solution, 20mL sachet
  • (1x) Electrode storage solution, 13mL dropper bottle
  • (1x) 3V Lithium battery (CR2032)
  • (1x) Instruction manual
  • (1x) Instrument quality certificate
More Information
Manuals Product Manual
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