| Output | SDI-12 |
| Soil VWC range | 5 to 50 % |
| Soil VWC resolution | 0.05 % |
| Soil VWC accuracy | ±3 % |
| Soil temperature range | −10 to 70 °C |
| Soil temperature resolution | 0.02 °C |
| Soil temperature accuracy | ±0.5 °C |
| Bulk electrical conductivity range | 0 to 3 dS/m (CS650); 0 to 8 dS/m (CS655) |
| Bulk electrical conductivity resolution | 0.05 % |
| Bulk electrical conductivity accuracy | ±(5% of reading + 0.05 dS/m) |
| Warm-up time | 3 s |
| Rod length | 30 cm (CS650); 12 cm (CS655) |
| Protection rating | IP68 |
| Standard cable length | 3 m |
| Operating environment temperature | –50 to 70 °C |
| Operating environment humidity | 0 to 100% |