| Weight | 0.8 Kg. (Approx.) |
| Power | 1 X 9V Battery |
| Resolution | 0.1ppm |
| Range | 0-1999ppm (mg/L), 0-19.99 Ppt (mg/L) |
| Model No. | SI-186 |
| Display | 3½ Digit LCD |
| TDS Cell | Platinum DIP Type |
| Accuracy | ±1% FS ±1 Digit |
| Dimensions | 165 x 85 x 28 mm |
| Accessories | TDS Cell, Operation Manual. |
| Location | Worldwide |
| Weight | 2.5kg Approx. |
| Power | 50Hz |
| Resolution | 0.1 Ppm |
| Model No. | SI-187 |
| Display | 3½ Digit LED |
| Measurement TDS Ranges | 0 to 200 ppm,0 to 2000 ppm,0 to 20.00ppt (20000 ppm),0 to 200.0ppt (200000 ppm),0 to 1000ppt (1000000 ppm) |
| Accuracy | ±2%FS±1 Digit Temperature |
| Compensation Manual | 0 to 50oC |
| Cell Constant | Adjustable on Digital Display |
| Measuring Cell | Platinum DIP type |
| Dimensions | 275 X 175 X 76mm |
| Location | Worldwide |