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| Brand | METTLER TOLEDO |
|---|---|
| Origin | Switzerland |
| Model | T7 |
| Instrument Type | General-purpose Potentiometric Titrator |
| Measurement Range | −2000 to +2000 mV |
| Meter Accuracy | ±0.2 mV |
| Meter Resolution | 0.1 mV |
| Titration Precision | ±0.2 mV |
| Compliance | Designed for GLP/GMP environments with full audit trail support per FDA 21 CFR Part 11 requirements |
| Brand | Leichi |
|---|---|
| Origin | Shanghai, China |
| Model | ZDJ-5 |
| Instrument Type | General-purpose Potentiometric Titrator |
| Application Scope | Universal |
| pH Range | 0.00–14.00 pH |
| mV Range | 0–±1999.0 mV |
| Temperature Range | −5.0–105.0 °C |
| pH Resolution | 0.01 pH |
| mV Resolution | 0.1 mV |
| Temperature Resolution | 0.1 °C |
| pH Accuracy | ±0.01 pH ± 1 digit |
| mV Accuracy | ±0.03% FS |
| Temperature Accuracy | ±0.3 °C ± 1 digit |
| Conductivity Range | 0.000–199.9 µS/cm |
| Conductivity Resolution | 0.001 µS/cm |
| Conductivity Accuracy | ±0.5% FS |
| Polarographic Current Ranges | 0–199.9 µA, 0–19.99 µA, 0–1.999 µA, 0–0.199 µA |
| Polarization Voltage Options | 3, 50, 100 mV |
| Titration Precision | ±0.03% FS |
| Titration Resolution | 1/1,500,000 |
| Endpoint Detection Sensitivity (Potentiometric) | ±2 mV |
| Endpoint Detection Sensitivity (Amperometric) | ±5% FS |
| Repeatability of Titration Analysis | 0.2% |
| Brand | Leici |
|---|---|
| Origin | Shanghai, China |
| Model | DDSJ-308F |
| Form Factor | Benchtop |
| Application Environment | Laboratory |
| Conductivity Range | 0.000 µS/cm to 199.9 mS/cm |
| TDS Range | 0.000 mg/L to 99.9 g/L |
| Resistivity Range | 5.00 Ω·cm to 20.00 MΩ·cm |
| Salinity Range | 0.00–8.00 % |
| Temperature Range | −5.0 to 110.0 °C |
| Accuracy | ±0.5 % FS (Conductivity/TDS), ±0.1 % FS (Salinity), ±0.2 °C (Temperature) |
| Minimum Resolution | 0.001 µS/cm |
| Stability | ±0.3 % FS / 3 h |
| Temperature Compensation | Automatic or Manual (−5.0 to 135.0 °C) |
| Data Storage | 200 datasets per parameter (Conductivity, TDS, Salinity), GLP-compliant |
| Interface | USB |
| Power Backup | Non-volatile memory retention on power loss |
| Brand | Leici |
|---|---|
| Origin | Shanghai, China |
| Model | DDS-307A |
| Instrument Type | Benchtop Single-Parameter Conductivity Meter |
| Conductivity Range | 0.00 μS/cm to 100 mS/cm |
| TDS Range | 0–1000 mg/L |
| Resistivity Range | 0.00 Ω·cm to 100 MΩ·cm (derived from conductivity) |
| Salinity Range | 0–1000 mg/L NaCl equivalent |
| Temperature Range | 0–60 °C |
| Accuracy | ±1% FS (conductivity & TDS), ±0.3 °C (temperature) |
| Minimum Resolution | 0.01 μS/cm |
| Temperature Compensation | Manual or Automatic (0–40 °C) |
| Electrode Compatibility | DJS-1C platinized platinum conductivity cell (K = 1.0 cm⁻¹), T-818-B-6 thermistor probe |
| Cell Constant Options | 0.01 cm⁻¹ titanium alloy electrode for ultrapure water measurement |
| Display | LCD segment-type, large-character format |
| Brand | Leici |
|---|---|
| Origin | Shanghai, China |
| Model | DDBJ-350 |
| Portability | Portable |
| Intended Use | Laboratory & Field |
| Conductivity Range | (0.00–1.999×10⁵) µS/cm (5 auto-ranging spans) |
| TDS Range | (0.00–19,990) mg/L (5 auto-ranging spans) |
| Salinity Range | (0.00–8.00)% |
| Resistivity Range | 0–100 MΩ·cm |
| Temperature Range | (0.0–40.0) °C |
| Conductivity Accuracy | ±1.0% FS ±1 digit |
| Salinity Accuracy | ±0.2% ±1 digit |
| Temperature Accuracy | ±0.3 °C ±1 digit |
| Temperature Compensation | 0.0–40.0 °C (reference 25 °C for conductivity, 18 °C for salinity) |
| Electrode Constants Available | 0.01, 0.1, 1.0, 10.0 cm⁻¹ |
| Data Storage Capacity | 250 sets |
| Interface | RS-232 |
| IP Rating | IP65 |
| Power Management | Low-power design with low-battery indicator and auto-off |
| Brand | Leici |
|---|---|
| Origin | Shanghai, China |
| Model | PHBJ-260 |
| Instrument Type | Portable |
| Parameter Type | Single-parameter (pH/mV/T) |
| Measurement Range | 0.00–14.00 pH |
| Resolution | 0.01 pH |
| Accuracy | ±0.01 pH ±1 digit |
| Temperature Compensation | Manual/Automatic (0–99 °C) |
| Display | Backlit LCD with blue illumination |
| Data Storage | 200 sets |
| Interface | RS-232 |
| IP Rating | IP65 |
| Power Supply | 4 × AA alkaline batteries |
| Buffer Options | Five selectable Chinese-standard pH calibration solutions |
| Measurement Modes | pH, mV (ORP), and temperature (−5.0–105.0 °C) |
| Brand | Leici |
|---|---|
| Origin | Shanghai, China |
| Model | PHSJ-3F |
| Instrument Type | Benchtop |
| Parameter Type | Single-Parameter (pH/mV/T) |
| Measurement Range | –2.000 to 20.000 pH |
| Resolution | 0.01 pH |
| Accuracy | ±0.01 pH ±1 digit |
| Temperature Compensation | Automatic or Manual (–5.0 to 135.0 °C) |
| Buffer Recognition | Auto-detection of 5 standard Chinese calibration buffers |
| Calibration Points | Up to 3-point pH calibration |
| Isoelectric Point Options | 3 selectable (for ultrapure water, boiler water, and low-ionic-strength samples) |
| Data Storage | 500 GLP-compliant measurement records |
| Interface | USB port with dedicated PC communication software |
| Display | Dot-matrix LCD with simultaneous readout of pH, mV, temperature, electrode slope, isoelectric point, mode, date/time |
| Enclosure Material | Flame-retardant polycarbonate (PC) front panel |
| Power | AC adapter with battery backup (data protection during power loss) |
| Brand | Leici |
|---|---|
| Origin | Shanghai, China |
| Model | PHS-3C |
| Instrument Type | Benchtop |
| Parameter Type | Single-Parameter (pH/mV) |
| Measurement Accuracy | ±0.01 pH ±1 digit |
| Measurement Range | pH: 0.00–14.00 |
| mV | −1999–+1999 |
| Resolution | 0.01 pH |
| Input Impedance | 1 × 10¹² Ω |
| Stability | ±0.01 pH ±1 digit / 3 h |
| Temperature Compensation Range | 0–60 °C |
| Display | 3½-digit LED |
| Calibration Options | One-point or two-point calibration |
| Compliance | Meets Chinese National Standard GB/T 24375–2009 for laboratory pH meters |
| Power Supply | AC 220 V ± 22 V, 50 Hz ± 1 Hz |
| Dimensions | 290 × 210 × 95 mm |
| Weight | 1.5 kg |
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