PH Meter for Water - PHep by Hanna - HI98107

Hanna Instruments pHep® HI98107 – Pocket pH Meter for Water Testing

Introduction

Water quality testing is one of the most essential analytical procedures in laboratories, industries, and even at the consumer level. Among all the parameters that define water quality, pH is one of the most fundamental. It affects chemical reactions, biological growth, corrosion rates, and disinfectant effectiveness.

Monitoring pH is crucial in fields such as drinking water purification, wastewater treatment, aquaculture, hydroponics, food processing, and environmental monitoring.

Hanna Instruments, a global leader in analytical instrumentation, developed the pHep® series of pocket pH testers. The HI98107 pHep® model is one of the most popular, known for its rugged design, ease of use, reliable accuracy, and affordable price.

Background: Why Test pH in Water?

Drinking Water Quality

WHO recommends drinking water pH between 6.5 and 8.5. Outside this range, water may taste unpleasant, corrode pipes, or pose health risks.

Aquaculture and Fisheries

Most freshwater fish thrive in a pH range of 6.5–9.0. Deviations can be harmful or fatal.

Swimming Pools and Spas

Maintaining a pool pH of 7.2–7.8 ensures swimmer comfort and chlorine effectiveness.

Agriculture and Hydroponics

Plant nutrient uptake depends on pH. Hydroponic growers closely monitor it for optimal yield.

Industrial and Environmental Monitoring

pH monitoring ensures wastewater and chemical effluents meet safety regulations and protect ecosystems.

Overview of the HI98107 pHep® Meter

The HI98107 is a rugged, pocket-sized pH meter balancing portability, affordability, and accuracy.

• Pocket size, lightweight design
• Simple two-button operation
• Automatic Temperature Compensation (ATC)
• Replaceable electrode with extractable cloth junction
• Approx. 800 hours of battery life
• Large, clear LCD display

Technical Specifications

• pH Range: 0.0 to 14.0
• Resolution: 0.1 pH
• Accuracy: ±0.1 pH
• Calibration: Manual, 2-point
• Temperature Compensation: Automatic (ATC)
• Electrode: Replaceable with extractable cloth junction
• Battery Life: ~800 hours
• Display: Large LCD
• Dimensions: 150 × 30 × 21 mm
• Weight: ~45 g

Key Features in Detail

1. Rugged and Portable Design – Compact and durable for field or lab use.
2. User-Friendly Operation – Two-button simplicity for beginners.
3. Replaceable Electrode – Extended lifespan with extractable cloth junction.
4. Automatic Temperature Compensation – Accurate readings across temperatures.
5. Long Battery Life – ~800 hours with low-battery indicator.
6. Large LCD Display – Easy-to-read measurements.

Applications

• Drinking water analysis
• Aquarium & aquaculture monitoring
• Swimming pools & spas
• Hydroponics & agriculture
• Environmental monitoring
• Educational demonstrations

Step-by-Step: Using the HI98107

1. Turn on the meter.
2. Remove cap and rinse electrode with distilled water.
3. Immerse electrode in sample and stir gently.
4. Wait for stable reading, then record value.
5. Rinse and replace cap after use.

Calibration Process

1. Prepare pH 7.01 and pH 4.01 buffer solutions.
2. Press CAL to enter calibration mode.
3. Immerse in pH 7 buffer, adjust using trimmer.
4. Rinse, repeat with pH 4 buffer.
5. Exit calibration; ready for use.

Advantages

• Affordable and reliable
• Durable with replaceable electrode
• Portable pocket design
• Trusted global brand

Limitations

• Manual calibration required
• Measures only pH (no TDS/EC)
• Accuracy limited to ±0.1 pH

Maintenance Tips

• Keep electrode moist in storage solution.
• Avoid storing in distilled or deionized water.
• Refresh cloth junction periodically.
• Replace electrode if calibration becomes unstable.

Comparison with Other Hanna Models

• HI98128 (pHep® 5): Waterproof, advanced calibration.
• HI99161: Designed for food applications.
• edge® HI2002: Advanced benchtop precision model.

Conclusion

The Hanna Instruments HI98107 pHep® is a reliable, affordable, and user-friendly pocket pH meter. It balances ruggedness, simplicity, and accuracy, making it ideal for water testing in households, aquaculture, agriculture, and environmental monitoring.

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