What the Hanna GroLine HI9814 Measures
pH runs -2.00 to 16.00 at 0.01 resolution, accurate to ±0.02 pH. Calibration is automatic, at one or two points on 4.01, 7.01 and 10.01 buffers. Conductivity covers 0.00 to 6.00 mS/cm at 0.01 resolution, within ±2% of full scale, calibrated at a single point of 1.41 or 5.00 mS/cm. TDS reads to 3000 ppm on the 0.5 factor or 3990 ppm on 0.7, and the factor is selectable. Temperature spans -5.0 to 105.0 °C. The pH accuracy is the number that matters most here.
Running a Portable pH EC Meter in a Wet Room
The case is rated IP67, so a splash or a short drop in the tank is not the end of it. Power is three AAA cells, good for roughly 600 hours of use. Auto-off can be set to 8 minutes, 60 minutes, or switched off entirely. The probe is the HI1285-7, pre-amplified with gel electrolyte on a one metre quick connect cable. In the box with it are three sachets of quick calibration solution, three of cleaning solution, the batteries and the manual. The warranty split says something useful. The meter is warranted for two years and the probe for six months, which tells you the probe is a consumable. Budget a replacement into the running cost rather than treating it as a failure.
Key Features
- pH to 0.01 resolution: Accurate to plus or minus 0.02 pH, which is tight enough for a feed chart.
- Automatic calibration: One or two points on 4.01, 7.01 and 10.01 buffers, with no manual trimming.
- EC and TDS on the same pen: 0.00 to 6.00 mS/cm, and TDS with a selectable 0.5 or 0.7 conversion factor.
- Temperature built in: Minus 5.0 to 105.0 degrees C, compensating the pH and EC readings.
- IP67 waterproof: Survives a splash or a short drop into the reservoir.
- About 600 hours on three AAA: A season of daily checks before the batteries need thinking about.
- Selectable auto-off: 8 minutes, 60 minutes, or disabled when you are working through a bench.
- HI1285-7 probe supplied: Pre-amplified, gel electrolyte, on a one metre quick connect cable.
- Quick Cal sachets in the box: Three calibration and three cleaning sachets, so it works out of the box.
- Probe is a consumable: Two year meter warranty, six months on the probe. Plan for the swap.
Technical Specifications
| Specification | Value |
|---|---|
| Brand | Hanna Instruments |
| Part Number | HI9814 |
| Model | GroLine, waterproof portable |
| Measures | pH, EC, TDS and temperature |
| pH Range | -2.00 to 16.00 pH |
| pH Resolution | 0.01 pH |
| pH Accuracy | ±0.02 pH at 25 °C |
| pH Calibration | Automatic, one or two point, 4.01, 7.01 and 10.01 |
| EC Range | 0.00 to 6.00 mS/cm |
| EC Resolution | 0.01 mS/cm |
| EC and TDS Accuracy | ±2% of full scale at 25 °C |
| EC Calibration | Single point at 1.41 or 5.00 mS/cm |
| TDS Range | 0 to 3000 ppm at 0.5 CF, 0 to 3990 ppm at 0.7 CF |
| TDS Resolution | 10 ppm |
| Conversion Factor | 0.5 or 0.7, selectable |
| Temperature Range | -5.0 to 105.0 °C, 23.0 to 221.0 °F |
| Temperature Accuracy | ±0.5 °C, ±1.0 °F |
| Probe | HI1285-7, pre-amplified, 1 m cable, quick connect |
| Protection Rating | IP67 |
| Battery | 3 x 1.5 V AAA, about 600 hours |
| Auto Shut-off | 8 minutes, 60 minutes or disabled |
| Dimensions | 154 x 63 x 30 mm, 6.1 x 2.5 x 1.2 in |
| Weight | 196 g, 6.91 oz |
| Supplied With | Probe, 3 quick calibration sachets, 3 cleaning sachets, batteries, manual |
| Warranty | Two years on the meter, six months on the probe |