This document is the instruction manual for Hanna HI 9812-0 and HI 9812-5 portable pH/EC/TDS/°C meters.
The Hanna Instruments HI 9812-0 and HI 9812-5 are complete, versatile, and rain-proof portable combined meters designed for aquariums, fish-farming, and seawater applications. The HI 9812-0 measures pH, EC, and TDS, while the HI 9812-5 adds temperature measurement in the °C scale. Both models feature a membrane keyboard for easy selection of measurement ranges and automatic temperature compensation.
| pH Range | 0.0 to 14.0 |
|---|---|
| EC Range | 0 to 1990 µS/cm |
| pH Accuracy | ±0.1 (@20°C/68°F) |
| Battery Type | 1 x 9V alkaline |
| Battery Life | approx. 150 hours |
| Dimensions | 165 x 75 x 45 mm |
| Weight | 180 g |
The conversion factor is fixed at 0.5, meaning 1 µS/cm is equal to 0.5 ppm of TDS.
The instrument should be recalibrated whenever the electrode is replaced, at least once a month, after testing aggressive chemicals, or where extreme accuracy is required.
All Hanna Instruments meters are warranted for two years against defects in workmanship and materials, while probes are warranted for six months.