High-accuracy pocket pH tester with 0.01 resolution in a rugged, waterproof design. The Hanna HI98108 pHep®+ delivers professional-grade pH measurements with automatic temperature compensation, three-point calibration capability, and a unique cloth junction electrode—all in an ultra-slim, ergonomic design that fits comfortably in your hand or pocket.
Key Features & Benefits
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High precision 0.01 pH resolution – Professional accuracy for demanding applications
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Waterproof design – Fully waterproof for field and wet environment testing
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Three-point calibration – Up to 3-point calibration for maximum accuracy across pH range
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Cloth junction electrode – Larger surface area than ceramic for faster, more stable readings
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Automatic temperature compensation – Exposed temperature sensor for rapid ATC measurements
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Ultra-slim design – Only 0.7" thick, extremely ergonomic and portable
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Two-button operation – Simple interface for easy operation by anyone
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Large display – Easy-to-read LCD shows pH, temperature, and status indicators
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Rugged construction – Built to withstand demanding field and industrial environments
Professional Performance in a Pocket Design
The HI98108 pHep®+ bridges the gap between basic pocket testers and expensive benchtop meters. With 0.01 pH resolution and three-point calibration capability, it delivers laboratory-grade accuracy in a portable, field-ready package. Whether you're testing in the lab, on the production floor, or in the field, the pHep®+ provides the precision and reliability you need.
Advanced Technology for Accurate Testing
0.01 pH Resolution
The HI98108 provides 0.01 pH resolution—ten times more precise than standard 0.1 resolution pocket testers. This high resolution is essential for applications requiring tight pH control, such as:
- Chemical manufacturing and process control
- Water treatment and wastewater monitoring
- Food and beverage production
- Pharmaceutical quality control
- Research and laboratory work
- Hydroponics and precision agriculture
Three-Point Calibration
Unlike basic pocket testers limited to one or two-point calibration, the pHep®+ supports up to three-point calibration for superior accuracy across the entire pH range. Calibrate to pH 4.01, 7.01, and 10.01 buffers to ensure accurate measurements whether testing acidic, neutral, or alkaline samples.
Unique Cloth Junction Electrode
The HI98108 features a unique reference cell design with a cloth junction that provides a larger surface area than standard ceramic junctions. This innovative design offers:
- Faster response times for quicker measurements
- More stable readings in varying sample conditions
- Better electrical contact with samples
- Extractable junction for extended electrode life
- Improved performance in samples with suspended solids
Automatic Temperature Compensation (ATC)
An exposed temperature sensor allows for rapid automatic temperature compensated pH measurements. The sensor quickly equilibrates with sample temperature, ensuring accurate pH readings regardless of temperature variations. Temperature can be displayed in either °C or °F.
Waterproof Construction
Fully waterproof design protects the tester in wet environments, making it ideal for poolside testing, field sampling, production floor use, and laboratory applications where water exposure is common.
User-Friendly Design Features
Ultra-Slim, Ergonomic Design
At only 0.7" (17mm) thick and lightweight, the pHep®+ is extremely ergonomic and fits comfortably in your hand. The slim profile makes it easy to carry in a pocket, lab coat, or field kit without adding bulk.
Two-Button Operation
Simple two-button interface makes operation intuitive for anyone. One button for ON/OFF, the other for calibration—no complicated menus to navigate.
Large LCD Display
The large, easy-to-read LCD displays:
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pH reading: 0.01 resolution for precise measurements
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Temperature: Simultaneous temperature display
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Stability indicator: Confirms when reading is stable
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Calibration tags: Shows which buffers were used
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Battery status: Low battery warning
Field-Ready Calibration
For field calibration, the quick calibration solution allows users to standardize pH in a few quick steps. The calibration bottle fits securely in the thermoformed meter case, providing easy, leak-proof transport.
Versatile Applications
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Industrial: Chemical manufacturing, plating, petrochemical, water treatment
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Water: Drinking water, wastewater, environmental monitoring, aquaculture
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Food & Beverage: Meat, dairy, processed foods, wine, beer, maple syrup
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Agriculture: Hydroponics, soil analysis, irrigation water
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Laboratory: Research, education, quality control
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Pool & Spa: Swimming pools, hot tubs, aquariums
Complete Kit - Ready to Test
The HI98108 pHep®+ arrives with everything needed for immediate testing:
- HI98108 pHep®+ pH tester with cloth junction electrode
- pH buffer solutions for calibration
- Electrode cleaning solution
- Storage/protection sleeve
- Battery (pre-installed)
- Thermoformed meter case with calibration bottle
- Quality certificate
- Instruction manual
Technical Specifications
| Specification |
Detail |
| SKU |
HI98108 |
| pH Range |
0.00 to 14.00 pH |
| pH Resolution |
0.01 pH |
| pH Accuracy |
±0.05 pH (typical for pocket testers) |
| pH Calibration |
Automatic, up to three-point (pH 4.01, 7.01, 10.01) |
| Temperature Compensation |
Automatic (ATC) with exposed sensor |
| Temperature Display |
Yes, simultaneous with pH (°C or °F selectable) |
| Electrode Type |
Built-in with cloth junction (extractable) |
| Waterproof |
Yes, fully waterproof |
| Display |
Large LCD with stability indicator and calibration tags |
| Operation |
Two-button (ON/OFF and Calibration) |
| Thickness |
0.7" (17 mm) - ultra-slim design |
| Weight |
Lightweight, pocket-portable |
Why Choose the pHep®+?
Superior to Basic Pocket Testers
The 0.01 pH resolution and three-point calibration capability set the pHep®+ apart from basic pocket testers that offer only 0.1 resolution and two-point calibration. This makes it ideal for applications requiring tighter pH control and higher accuracy.
More Portable Than Benchtop Meters
While benchtop meters offer excellent accuracy, they're not portable. The pHep®+ delivers comparable precision in a pocket-sized design, making it perfect for field testing, production floor QC, and on-the-go measurements.
Rugged & Reliable
Built to withstand demanding environments, the waterproof pHep®+ handles wet conditions, temperature variations, and the rigors of daily field and industrial use.
Maintenance & Care
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Storage: Store in the provided protective sleeve when not in use
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Cleaning: Clean electrode regularly with the provided cleaning solution
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Rinsing: Rinse with distilled water between samples to prevent cross-contamination
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Calibration: Calibrate regularly using fresh buffer solutions for optimal accuracy
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Junction renewal: The extractable cloth junction can be pulled out slightly to expose fresh material
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Battery: Replace battery when low battery indicator appears
Replacement Parts & Accessories
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HI70004P: pH 4.01 buffer solution
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HI70007P: pH 7.01 buffer solution
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HI70010P: pH 10.01 buffer solution
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HI700601: Electrode cleaning solution
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HI70300: Storage solution for pH electrodes
Why Hanna Instruments?
With over 40 years of experience in analytical instrumentation, Hanna Instruments is a global leader trusted by professionals in over 140 countries. The pHep®+ represents Hanna's commitment to combining professional-grade accuracy with user-friendly operation and portable convenience. The unique cloth junction electrode technology and three-point calibration capability make the pHep®+ a best-seller for professionals who demand precision without sacrificing portability.
Warranty & Support
The HI98108 pHep®+ is backed by Hanna's quality guarantee and customer support. For technical assistance, calibration questions, or replacement parts, our expert team is ready to help.
