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HI98128 (Combo pH/ORP/Temperature Tester)

Combo pH/ORP/Temperature Tester


  • Waterproof and designed to float

  • Measurement accuracy of ± 0.05 pH

  • Easily replaceable electrode

  • Renewable fuel diaphragm

  • Automatic calibration and temperature compensation of pH

  • Stability indicator for safe values

  • HOLD function to hold a reading in the display

  • Battery charge indicator and automatic shut-off

  • Splash-proof housing


Product Description



pH Range -2.00 to 16.00 pH
Temperature Range -5.0 to 60.0°C / 23.0 to 140.0°F
pH Resolution 0.01 pH
Temperature Resolution 0.1°C
pH Accuracy ±0.05 pH
Temperature Accuracy ±0.5°C
pH Calibration automatic, at one or two points with two sets of standard buffers
Temperature Compensation Automatic
Probes HI 73127
Battery Type/Life 1.5V (4) / approx. 300 hours of continuous use; auto-off after 8 minutes of non-use
Dimensions 163 x 40 x 26 mm 
Weight 100 g


The pHep®4 and pHep®5 testers are for users that require the greatest accuracy and features while staying economical. The pHep®4 has a 0.1 pH resolution and pHep®5 reads up to 0.01 pH. It measures and displays both, pH and temperature. Pure technology, it is distinguished by its ease of use, accuracy, reliability and robustness. Versatile, a performance / price ratio unmatched, fit any budget, and place in any environment.


Order Information

HI 98127 (pHep®4) and HI 98128 (pHep®5) are supplied with HI 73127 pH electrode, HI 73128 electrode removal tool, batteries and instructions.

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