Contact formProduct Highlights：
Dual measurement mode: stable measurement, accurate data
IP65 waterproof and dustproof: closed shell ensures safe operation
Automatic electrode calibration: 1-3 point pH electrode calibration
| model | HT-PHB-4P | HT-PHB-4 |
| Instrument level | 0.02 level | 0.1 level |
| pH measurement range | -2.00-18.00 | 0.00-14.00 |
| pH indication error | ±0.01pH | ±0.05pH |
| mV measurement range | -2000mv-2000mv | -1400mV-1400mV |
| mV Indication error | ±0.1% FS | ±0.2% FS |
| temperature compensation | manual | manual |
| Data storage | 200 sets | 200 sets |
