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Hanna Instruments – HI98127 pHep®4 pH/Temperature Tester with 0.1 pH Resolution

The pHep®4 (HI98127) from Hanna Instruments is a compact, ergonomic, and fully waterproof pH and temperature tester designed for accurate and reliable measurements in demanding environments. With an expanded measurement range from -2.0 to 16.0 pH, ±0.1 pH accuracy, and automatic temperature compensation, it ensures consistent and stable readings across various applications. The floating waterproof casing, replaceable electrode design, and automatic two-point calibration make it an ideal solution for laboratories, field testing, water treatment, aquaculture, and industrial quality control.

  • Waterproof & Floating Design
  • Expanded pH Range: -2.0 to 16.0 pH
  • Automatic Two-Point Calibration
  • Replaceable pH Electrode (HI73127)

Description

The pHep®4 HI98127 is a state-of-the-art handheld tester engineered for precision and durability. Featuring a measurement range of -2.0 to 16.0 pH with 0.1 pH resolution and ±0.1 pH accuracy, it delivers dependable results across a wide variety of water testing applications. The built-in automatic temperature compensation (ATC) ensures accurate readings by adjusting for temperature variations, while the integrated thermistor provides precise temperature measurement from -5.0 to 60.0°C. A stability indicator confirms when readings are stable, and the HOLD function allows convenient data recording.

Designed for long-term reliability, the tester includes a replaceable HI73127 pH electrode, extending product lifespan and reducing maintenance cost. The rugged waterproof casing floats if accidentally dropped into water, providing added protection during field use. Additional features such as the Battery Error Prevention System (BEPS), automatic shut-off after 8 minutes of non-use, and selectable one- or two-point calibration make this tester user-friendly and energy-efficient. Compact and lightweight, the pHep®4 is ideal for professionals who require accurate, portable, and durable pH measurement equipment.

Features

  • Waterproof & Floating Casing – Designed to float if dropped in water for maximum protection during field use.
  • Expanded pH Range (-2.0 to 16.0 pH) – Suitable for a wide variety of laboratory and industrial applications.
  • Automatic Temperature Compensation (ATC) – Ensures accurate readings with temperature display in °C or °F.
  • Automatic Two-Point Calibration – Calibration at one or two points using standard buffer sets.
  • Replaceable pH Electrode (HI73127) – Extends tester lifespan and simplifies maintenance.
  • Stability Indicator – Confirms when the measurement has stabilized for reliable results.
  • HOLD Function – Freezes reading for easier recording.
  • Battery Error Prevention System (BEPS) – Prevents inaccurate readings due to low battery.
  • Automatic Shut-Off – Powers off after 8 minutes of non-use to conserve battery life.

Specifications

SKU HI98127
Product Name pHep®4 pH/Temperature Tester with 0.1 pH Resolution- HI98127
Quote Required Yes
pH Range -2.0 to 16.0 pH
pH Resolution 0.1 pH
pH Accuracy ±0.1 pH
pH Calibration automatic, at one or two points with two sets of standard buffers (pH 4.01 / 7.01 / 10.01 or pH 4.01 / 6.86 / 9.18)
pH Temperature Compensation automatic
Temperature Range -5.0 to 60.0°C / 23.0 to 140.0°F
Temperature Resolution 0.1°C / 0.1°F
Temperature Accuracy ±0.5°C /±1°F
pH Electrode HI73127 replaceable pH electrode (included)
Temperature Probe integrated thermistor
Automatic Shut-Off after 8 minutes of non-use
Battery Type/Life 1.5V (4) / approx. 300 hours of continuous use
Environment -5 to 50°C (23 to 122°F); RH max 100%
Dimensions 163 x 40 x 26 mm (6.4 x 1.6 x 1.0’’)
Weight 100 g (3.5 oz.)
Ordering Information HI98127 (pHep®4) is supplied with HI73127 pH electrode, HI73128 electrode removal tool, batteries and instructions.

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