Test pool and spa water with professional accuracy using the Hanna Instruments HI981304 Pool Line waterproof combo meter. This 3-in-1 handheld tester measures pH, EC (electrical conductivity), and TDS (total dissolved solids) with laboratory-grade precision, designed specifically for swimming pools, hot tubs, and spas.
Key Professional Features:
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Waterproof and floats: IP67 rated design floats in water for easy poolside testing without worry
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High-accuracy pH: ±0.05 pH accuracy with 0.01 pH resolution and replaceable HI73127 electrode
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High-range EC/TDS: Measures 0.00 to 20.00 mS/cm EC or 0.00 to 10.00 ppt TDS for complete water quality analysis
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Selectable TDS conversion: Choose 0.45 or 1.0 conversion factor to match your testing protocol
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Automatic Temperature Compensation: Built-in ATC ensures accurate readings across temperature ranges (0-60°C / 32-140°F)
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Graphite EC/TDS probe: Amperometric sensor reduces polarization effects and resists oxidation for long-term reliability
User-Friendly Design:
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Large LCD display: Shows stability indicator, low-battery warning, and calibration tags for confident measurements
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HOLD button: Freeze readings for easier recording and documentation
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Auto-calibration: One or two-point pH calibration with standard buffers (4.01/7.01/10.01 or 4.01/6.86/9.18)
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Battery Error Prevention System (BEPS): Alerts you before battery depletion affects accuracy
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Auto shut-off: Conserves battery with 8-minute auto-off (approx. 100 hours continuous use)
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Lightweight and portable: Only 100g (3.5 oz) for easy one-handed operation
Professional Applications:
Essential for pool service professionals, spa maintenance technicians, aquatic facility managers, and residential pool owners who demand accurate water chemistry monitoring. Perfect for routine maintenance, troubleshooting water balance issues, and ensuring safe, comfortable swimming conditions.
Complete Technical Specifications:
| Specification |
Detail |
| Model |
HI981304 |
| pH Range |
0.00 to 14.00 pH |
| pH Resolution |
0.01 pH |
| pH Accuracy (@25°C/77°F) |
±0.05 pH |
| pH Calibration |
Automatic, one or two-point with two sets of standard buffers (pH 4.01/7.01/10.01 or 4.01/6.86/9.18) |
| EC Range |
0.00 to 20.00 mS/cm |
| EC Resolution |
0.01 mS/cm |
| EC Accuracy |
±2% F.S. |
| EC Calibration |
Automatic, one point at 12.88 mS/cm or 6.44 ppt (g/L) |
| TDS Range |
0.00 to 10.00 g/L (ppt) |
| TDS Resolution |
0.01 ppt (g/L) |
| TDS Accuracy |
±2% F.S. |
| TDS Calibration |
Automatic, one point at 12.88 mS/cm or 6.44 ppt (g/L) |
| Temperature Range |
0.0 to 60.0°C / 32.0 to 140.0°F |
| Temperature Resolution |
0.1°C / 0.1°F |
| Temperature Accuracy |
±0.5°C / ±1°F |
| pH Electrode |
HI73127 (replaceable, included) |
| Automatic Shut-Off |
Auto-off after 8 minutes of non-use |
| Battery Type/Life |
1.5V (4) / approx. 100 hours of continuous use |
| Environment |
0 to 50°C (32 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) |
What's Included:
HI981304 comes complete with HI73127 replaceable pH electrode, HI73128 electrode removal tool, pH 4.01 buffer solution sachet, pH 7.01 buffer solution sachet, 12880 µS/cm conductivity standard sachet, 6.44 ppt TDS standard sachet, batteries, and instructions.
Professional-Grade Quality:
Manufactured in Romania by Hanna Instruments to exacting standards. The HI981304 combines the convenience of a handheld tester with the accuracy of laboratory equipment, making it the ideal choice for professionals and serious pool owners who refuse to compromise on water quality.
Replacement electrodes and calibration solutions available separately. Regular calibration recommended for maintaining measurement accuracy.
