Description
Take the guesswork out of water testing with the Hanna Instruments HI98129, the industry-standard "Combo" tester. Engineered for professionals in hydroponics, aquaculture, water treatment, and laboratory research, this 4-in-1 pocket meter provides highly accurate readings for pH, Electrical Conductivity (EC), Total Dissolved Solids (TDS), and Temperature—all in one rugged, waterproof device.
The All-In-One Solution
Stop switching between multiple meters. The HI98129 streamlines your routine by delivering four critical measurements at the push of a button. Its compact, lightweight design fits comfortably in your pocket, making it the perfect companion for field work or moving between tanks and vats.
Key Features
- 4-in-1 Versatility: Simultaneously measures pH, EC (low range), TDS, and Temperature.
- Fully Waterproof & Floating: Designed to withstand humid environments and accidental drops; the housing is completely sealed and is engineered to float if dropped in water.
- Replaceable pH Electrode: Features the HI73127 replaceable electrode cartridge. The sturdy snap-in connector means there are no pins to bend or break, and you can replace the sensor rather than the entire meter once it reaches the end of its life.
- Renewable Cloth Junction: Extend the life of your pH probe by simply pulling out 1/8” of the cloth junction to expose a fresh surface, instantly clearing clogs and restoring response time.
- Graphite EC/TDS Probe: Unlike steel probes, the graphite sensor resists contamination from salt deposits in the solution, ensuring long-term accuracy and minimal maintenance.
-
Advanced Automation:
- Automatic Calibration: 1 or 2-point pH calibration and 1-point EC/TDS calibration.
- Automatic Temperature Compensation (ATC): All readings are adjusted for temperature fluctuations, ensuring precision regardless of environmental conditions.
- Selectable Conversion Factors: Customize your TDS conversion factor (0.45 to 1.00) and temperature coefficient (β) to match your specific application.
Technical Specifications
| Measurement | Range | Resolution | Accuracy |
| pH | 0.00 to 14.00 pH | 0.01 pH | ±0.05 pH |
| EC | 0 to 3999 µS/cm | 1 µS/cm | ±2% F.S. |
| TDS | 0 to 2000 ppm | 1 ppm | ±2% F.S. |
| Temperature | 0.0 to 60.0°C / 32.0 to 140.0°F | 0.1°C / 0.1°F | ±0.5°C / ±1.0°F |
- Battery Life: Approx. 100 hours of continuous use (4 x 1.5V batteries included).
- Auto-Off: Preserves battery life by shutting down after 8 minutes of non-use.
- Dimensions: 163 x 40 x 26 mm (6.4 x 1.6 x 1.0")
- Weight: 100 g (3.5 oz.)
What’s Included?
- HI98129 Combo Tester
- HI73127 pH Electrode (Installed)
- HI73128 Electrode Removal Tool
- Protective Cap
- Batteries (4 x 1.5V)
- Instruction Manual
- Starter Calibration Kit: pH 4.01 & 7.01 buffer sachets, 1413 µS/cm conductivity sachet, and electrode storage solution.
Why choose the HI98129?
Trusted by growers and water quality professionals worldwide, the HI98129 offers a level of precision and durability that cheap imports cannot match. With its replaceable sensors and renewable junction, this meter is a long-term investment in your water quality management.
