| Display | 3½ Digital LED |
| Dimensions | 230mmx180mmx110mm |
| Light Source | 6V Tungsten Lamp Or Bright Blue LED |
| Model No | SI-221 |
| Detector | Photocell / Photodiode |
| Range | 0 to 1000 NTU |
| Resolution | 1 NTU |
| Accuracy | ±3% FS± 1digit |
| Stability | 30 mm Clear Glass Test |
| Power | 220V±10%, 50Hz AC |
| Location | Worldwide |
| Model No | SI- 224 |
| Display | 16 character x 2 lines Alphanumeric BL LCD |
| Power Supply | 230 V ± 10% 50 Hz AC |
| Turbidity Range | 0-1000 NTU in Two Ranges |
| Resolution | 1 NTU in lowest Range |
| Accuracy | ±3% FS±1-digit Range Selection Automatic |
| Detector | Photodiode/Photocell |
| Sample System | 30 mm Clear Glass test tube Calibration Manual |
| Light Source | 6V Tungsten Lamp Display format Temp. and parameter . |
| Location | Worldwide |