The HI99121 is the perfect portable pH meter for soil testing. With the HI99121 and HI12923 direct soil pre-amplified pH and temperature probe, users can test both the pH of soil directly or after preparation of a soil slurry with deionized water.
The HI12923 features a conical, rugged tip that can be directly inserted into moist or soft soil. For harder soils, the kit includes a plastic auger to perforate the ground.
| SKU | HI99121 |
| Name | Direct Soil Measurement pH Portable Meter – HI99121 |
| pH Range | -2.00 to 16.00 pH; -2.0 to 16.0 pH |
| pH Resolution | 0.01 pH; 0.1 pH |
| pH Accuracy | ±0.02 pH; ±0.1 pH |
| pH Temperature Compensation | automatic ‐5.0 to 105.0 °C/23.0 to 221.0 °F |
| pH CAL Check (electrode diagnostics) | probe condition indicator |
| mV Range | ±825 mV (pH‐mV) |
| mV Resolution | 1 mV |
| mV Accuracy | ±1 mV (pH‐mV) |
| Temperature Range | -5.0 to 105.0°C / 23.0 to 221.0°F |
| Temperature Resolution | 0.1°C / 0.1°F |
| Temperature Accuracy | ±0.5°C (up to 60°C); ±1.0°C (outside) / ±1°F (up to 140°F); ±2.0°F (outside) |
| Automatic Shut-Off | user selectable: after 8 min, 60 min or disabled |
| Battery Type/Life | 1.5V (3) AAA / approximately 1400 hours of continuous use; auto-off after 8 minutes of non-use |
| IP Protection | IP67 |