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| Brand | METTLER TOLEDO |
|---|---|
| Origin | Shanghai, China |
| Model | FE30K |
| Form Factor | Benchtop |
| Conductivity Range | 0.1 μS/cm to 199.9 mS/cm |
| TDS Range | 0.1 mg/L to 199.9 g/L |
| Resistivity Range | 0.1 Ω·m to 19.99 MΩ·cm |
| Salinity Range | 0.00 to 19.99 psu |
| Temperature Range | 0.0 to 100.0 °C |
| Conductivity Accuracy | ±0.5% of reading |
| Temperature Accuracy | ±0.1 °C |
| Temperature Compensation | Linear, adjustable from 0.000 to 10.000 %/°C |
| reference temperatures | 20 °C and 25 °C |
| Calibration | Single-point with three pre-stored standard solutions (84 μS/cm, 1413 μS/cm, 12.88 mS/cm) |
| Display | Backlit LCD showing conductivity/TDS/salinity/resistivity, temperature, stability indicator, calibration status, and compensation settings |
| Power Supply | 100–240 V AC, 50–60 Hz |
| Brand | Leichi |
|---|---|
| Origin | Shanghai, China |
| Model | DDBJ-350 |
| Portability | Portable |
| Conductivity Range | 0.000 µS/cm to 199.9 mS/cm (5 ranges) |
| TDS Range | 0.000 mg/L to 19.99 g/L (5 ranges) |
| Resistivity Range | Not applicable (mislisted in source |
| Salinity Range | (0.00–8.00)% |
| Temperature Range | 0.0–40.0 °C |
| Accuracy | ±1.0% FS (conductivity & TDS), ±0.2% FS (salinity), ±0.3 °C ±1 digit (temperature) |
| Stability | ±0.7% FS / 3 h |
| Resolution | 0.001 µS/cm (lowest range), up to 0.1 mS/cm (highest range) |
| Power | 4 × AA alkaline batteries |
| Dimensions | 210 × 86 × 50 mm |
| Weight | 0.5 kg |
| Data Storage | 100 sets |
| Interface | RS-232 serial port |
| Electrode | DJS-1CF platinized platinum conductivity cell (cell constant 1.0 cm⁻¹), T-818-B-6F thermistor temperature sensor |
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