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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 |
| Origin | Beijing, China |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Domestic (China) |
| Model | FE20K |
| Price | USD 580 (approx.) |
| pH Range | 0.00–14.00 |
| Resolution | 0.01 pH |
| Accuracy | ±0.01 pH |
| mV Range | ±1999 mV |
| mV Accuracy | ±1 mV |
| Temperature Range | 0–100 °C |
| Calibration Points | Up to 3-point |
| Temperature Compensation | Automatic or Manual |
| Endpoint Detection | Automatic or Manual |
| Buffer Recognition | Yes |
| Electrode Status Indicator | Yes |
| Slope Display | Yes |
| Reference Electrode Input | Yes |
| 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 |
| Brand | METTLER TOLEDO |
|---|---|
| Origin | Italy |
| Model | FE28 |
| Instrument Type | Benchtop |
| Parameter Types | pH and mV (single-channel) |
| pH Measurement Range | -2 to 16 |
| pH Resolution | 0.01 / 0.1 |
| pH Accuracy | ±0.01 |
| mV Measurement Range | 0 mV |
| mV Resolution | 1 mV |
| mV Accuracy | ±1 |
| Temperature Range | -5 °C to 105 °C |
| Temperature Resolution | 0.1 °C |
| Temperature Accuracy | ±0.3 °C |
| Data Storage Capacity | 200 measurements |
| Connectivity | RS232 and USB |
| Electrode Included | LE438 pH electrode |
| ISM Support | Not supported |
| Calibration Solution Compatibility | China-specific calibration buffers |
| Compliance | Designed for GLP-compliant routine lab use |
| Brand | Leici |
|---|---|
| Origin | Shanghai, China |
| Instrument Type | Benchtop |
| Parameter Type | Dual (pH/mV) |
| Measurement Range | pH (0.00–14.00), mV (−1999 to +1999) |
| Resolution | 0.01 pH / 1 mV |
| Accuracy | ±0.01 pH ±1 digit |
| Temperature Compensation | Manual (0.0–60.0 °C) |
| Display | Segment LCD |
| Calibration | Auto-buffer recognition, 2-point calibration |
| Power Supply | AC 220 V ±10%, 50 Hz |
| Dimensions & Weight | 300 × 220 × 90 mm, 1 kg |
| Compliance | Meets JJG 919–2008 (Chinese National Verification Regulation for pH Meters) |
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