
| PH30- Micro  | PH30- Testtube  | PH30-Semisolids  | PH30- Piercing  | PH30- Purewater  | PH30- Precision  | PH30- HF  | PH30- Seawater  | PH30- Colloid  | PH30- Organic  | 
| CS1903 | CS1906 | CS1912 | CS1915 | CS1918 | CS1921 | CS1928 | CS1929 | CS1958 | CS1997 | 
| pH Range | |
| Resolution | 0.01pH | 
| Accuracy | ±0.01pH | 
| Range Temp. | 0 - 100.0 °C / 32 - 212 °F | 
| Working Temp. | 0 - 60.0 °C / 32 - 140 °F | 
| Temp. Resolution | 0.1 °C / 1 °F | 
| Calibration Point | Up to 3(auto recognized) | 
| pH Buffer Kinds | USA: 4.01,7.00,10.01 | 
| NIST: 4.01,6.86,9.18 | |
| LCD | 20*30 mm with backlight | 
| Temp. Comp. | Auto/Manual | 
| Lock | Auto/Manual | 
| Protection | IP67 | 
| Auto backlight off | 30 seconds | 
| Auto power off | 20 minutes without key be pressed | 
| Power | 1x1.5V AAA battery | 
| Dimensions (mm) | 285×40×48(H×W×D) | 
| Weight | 130 g |