Waterproof, floating pH tester designed specifically for swimming pools, hot tubs, and spas. The Hanna HI981074 Pool Line pH Tester delivers professional accuracy with 0.1 pH resolution and ±0.1 pH accuracy, featuring automatic temperature compensation, simultaneous pH and temperature display, and a waterproof design that floats—making poolside testing safe, easy, and reliable.
Key Features & Benefits
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Waterproof & floats – IP67 rated, designed to float if dropped in water for easy retrieval
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High accuracy – ±0.1 pH precision for reliable pool water management
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Dual display – Shows pH and temperature simultaneously on large LCD
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Auto calibration – One or two-point automatic calibration with buffer recognition
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Temperature compensation – Automatic ATC ensures accurate readings at any water temperature
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Pool-optimized range – 0.1 pH resolution ideal for pool water testing (7.2-7.8 pH)
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Long battery life – Up to 800 hours continuous use with CR2032 battery
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Compact & portable – Slim 17mm design fits easily in pocket or pool maintenance kit
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Complete kit – Includes buffers, cleaning solution, battery, and protective sleeve
Why pH Matters for Pool Water
Maintaining proper pH levels (7.2-7.8) is critical for effective pool sanitation and swimmer comfort. The HI981074 helps you:
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Maximize chlorine effectiveness: pH above 7.4 ensures chlorine remains in its most effective sanitizing form
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Prevent eye and skin irritation: Balanced pH keeps water comfortable for swimmers
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Protect equipment: Proper pH prevents corrosion and scale buildup on pumps, heaters, and surfaces
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Maintain water clarity: Correct pH prevents cloudy water and algae growth
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Reduce chemical costs: Optimized pH means less chlorine needed for effective sanitation
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Meet health standards: Comply with health department requirements for commercial pools
Designed for Pool Professionals & Homeowners
Whether you're a pool service professional managing multiple accounts or a homeowner maintaining your backyard pool, the HI981074 Pool Line tester delivers the accuracy and convenience you need. The waterproof, floating design means you can test with confidence even in wet poolside environments, and if you accidentally drop it in the pool, it floats for easy retrieval.
Advanced Features for Confident Testing
Waterproof & Floats
IP67 waterproof rating protects against water immersion, making the HI981074 ideal for wet poolside environments. The floating design ensures that if you accidentally drop the tester in the pool, it won't sink—simply retrieve it from the surface and continue testing.
Simultaneous pH & Temperature Display
The large multi-level LCD displays both pH and temperature readings simultaneously, eliminating the need to switch between modes. This dual display also shows:
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pH reading: 0.1 resolution from 0.0 to 14.0 pH
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Temperature: 0.1°C/°F resolution, selectable units
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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
Automatic Temperature Compensation (ATC)
Built-in automatic temperature compensation ensures accurate pH readings regardless of water temperature variations from 0 to 50°C (32 to 122°F). The integrated temperature sensor quickly equilibrates with sample temperature for fast, reliable measurements.
Automatic Calibration
Calibrate automatically to one or two points using pre-programmed standard buffers (pH 4.01, 7.01, 10.01). The meter recognizes buffer values and automatically accepts and stores calibration when stability is reached—no manual entry required.
Flexible Auto Shut-Off
User-selectable automatic shut-off conserves battery life. Choose from 8 minutes, 60 minutes, or disabled to match your testing routine and workflow.
Exceptional Battery Life
The CR2032 3V Li-ion battery provides approximately 800 hours of continuous use. A low battery indicator alerts you when it's time to replace the battery, ensuring you're never caught without power during testing.
Perfect for Pool & Spa Applications
- Residential swimming pools
- Commercial pools and aquatic facilities
- Hot tubs and spas
- Splash pads and water features
- Pool service and maintenance companies
- Property management and HOA pools
- Hotel and resort pool maintenance
- Municipal pool facilities
- Water park testing
Complete Kit - Ready for Poolside Testing
The HI981074 Pool Line pH Tester arrives with everything needed for immediate pool testing:
- HI981074 waterproof pH tester with integrated temperature sensor
- pH 4.01 buffer solution sachet
- pH 7.01 buffer solution sachets (2)
- Electrode cleaning solution sachet
- Storage/protection sleeve
- CR2032 3V Li-ion battery (pre-installed)
- Quality certificate
- Instruction manual
Technical Specifications
| Specification |
Detail |
| SKU |
HI981074 |
| pH Range |
0.00 to 14.00 pH |
| pH Resolution |
0.1 pH |
| pH Accuracy (@25°C/77°F) |
±0.1 pH |
| pH Calibration |
Automatic, one or two-point (pH 4.01, 7.01, 10.01) |
| Temperature Range |
0.0 to 50.0°C (32.0 to 122.0°F) |
| Temperature Resolution |
0.1°C / 0.1°F |
| Temperature Accuracy |
±0.5°C / ±1.0°F |
| Temperature Compensation |
Automatic (ATC) |
| Waterproof Rating |
IP67 (waterproof and floats) |
| Automatic Shut-Off |
8 minutes, 60 minutes, or disabled (user-selectable) |
| Battery Type / Life |
CR2032 3V Li-ion / Approximately 800 hours continuous use |
| Environment |
0 to 50°C (32 to 122°F), RH 100% max |
| Dimensions |
160 × 40 × 17 mm (6.3 × 1.6 × 0.7") |
| Weight |
75 g (2.6 oz.) |
Pool pH Testing Best Practices
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Test frequency: Test pH twice daily during swimming season for optimal water quality
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Sample collection: Collect water at elbow depth, away from return jets and skimmers
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Rinse electrode: Rinse with sample water before testing to avoid contamination
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Allow stabilization: Wait for stability indicator before recording reading
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Clean regularly: Use provided cleaning solution to maintain electrode performance
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Store properly: Store in protective sleeve when not in use
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Calibrate weekly: Regular calibration ensures continued accuracy
Understanding Pool pH Levels
Ideal Range: 7.2 - 7.8 pH
Optimal for Chlorine: Above 7.4 pH ensures chlorine is predominantly in the more effective hypochlorous acid form
pH Too Low (< 7.2):
- Acidic water causes eye and skin irritation
- Corrosion of metal equipment, ladders, and fixtures
- Etching of plaster and grout surfaces
- Reduced chlorine effectiveness
- Rapid chlorine dissipation
pH Too High (> 7.8):
- Cloudy water appearance
- Scale formation on surfaces and equipment
- Reduced sanitizer efficiency
- Eye and skin irritation
- Filter clogging and reduced circulation
The HI981074's ±0.1 pH accuracy gives you the precision needed to maintain optimal pH levels and avoid these problems.
Simple Operation
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Power on: Press the ON button
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Rinse electrode: Rinse with pool water sample
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Immerse in sample: Submerge electrode in pool water
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Wait for stability: Stability indicator will disappear when reading is stable
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Read results: Note pH and temperature displayed simultaneously
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Record & adjust: Log reading and adjust chemicals as needed
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 Choose Hanna Pool Line?
Hanna's Pool Line series is specifically designed for pool and spa professionals and enthusiasts. With over 40 years of experience in analytical instrumentation, Hanna understands the unique challenges of pool water testing. The HI981074 combines professional ±0.1 pH accuracy with waterproof, floating design and user-friendly operation, making it the ideal choice for anyone serious about pool water quality and safety.
The Importance of Regular pH Testing
Testing your pH twice daily allows you to keep your pH within the correct range, ensuring your pool, hot tub, or spa is clean and free of potential bacteria or pathogens. Keeping pH in the acceptable range is vital for the effectiveness of sanitization with chlorine. The simple-to-use nature of the HI981074 makes taking readings and recording them effortless, whether you're managing one pool or multiple facilities.
Warranty & Support
The HI981074 Pool Line pH Tester 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.
