Hanna Instruments pH/Temperature Tester with 0.01 pH Resolution - pHep®5 - HI98128

The HI98128 pHep®5 is a high-precision, waterproof pH and temperature tester designed for accuracy and portability. With 0.01 pH resolution and ±0.05 pH accuracy, this pocket-sized tester is ideal for quick, reliable measurements in the field or lab. Built for ease of use and longevity, it features automatic calibration, a replaceable electrode, and temperature compensation — all in one compact device.

• High-resolution 0.01 pH accuracy
• Replaceable electrode with round stainless steel connector
• Compact, waterproof, and designed to float if dropped
• Temperature displayed in °C or °F alongside pH

Key Features:

Automatic Multi-Point Calibration
Supports one, two, or three-point calibration using two selectable buffer sets (4.01, 7.01, 10.01 or 4.01, 6.86, 9.18) for precise pH accuracy across a wide range.

Replaceable Electrode with Cloth Junction
Features the HI73127 snap-in pH electrode with an extractable cloth junction. When the junction becomes clogged, simply pull out ⅛" to expose a fresh section, restoring optimal performance and extending electrode life.

Expanded Measurement Range
Covers an impressive pH range from -2.00 to 16.00, making it suitable for a wide variety of applications from industrial to environmental testing.

Smart Design & Reliability:

• Waterproof Housing: Designed to float if accidentally dropped in a tank or container
• Automatic Temperature Compensation: Ensures accurate readings regardless of temperature fluctuations
• Stability Indicator: Clock tag disappears when measurement stabilizes
• HOLD Function: Freezes the display to easily record readings
• Battery Error Prevention (BEPS): Device will shut off if battery power is too low for accurate measurements
• Auto-Off Function: Automatically powers down after 8 minutes of inactivity to conserve battery