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| Brand | DoctorWater |
|---|---|
| Origin | Hunan, China |
| Model | Dr-W120 |
| Instrument Type | Portable |
| Measurement Principle | Optical (LED-based colorimetric method with interference-compensated photometry) |
| Measurement Range (DO) | 0.20–15.00 mg/L |
| Accuracy | ≤ ±5% |
| Repeatability | ≤ ±2% |
| Detection Limit | 0.20 mg/L |
| Wavelength Range | 330–900 nm |
| Wavelength Accuracy | ±5 nm |
| Absorbance Resolution | 0.001 Abs |
| Optical Stability | ≤ ±0.005 Abs/20 min |
| Display | 5-inch HD color capacitive touchscreen |
| Power Supply | Rechargeable Li-ion battery + AC adapter |
| Data Storage | 1,000,000 measurement records |
| Interface | USB Type-C (charging & data transfer) |
| Calibration Modes | Blank, Factor, and Curve calibration |
| Language Support | English / Chinese switchable |
| Sample Format | 16 mm and 25 mm round cuvettes |
| Light Source | Imported long-life cold LED (≥100,000 h) |
| Housing Material | Corrosion-resistant ABS |
| Printer | Built-in thermal printer |
| Readout Units | mg/L, ppm, or Abs |
| Brand | DoctorWater |
|---|---|
| Origin | Hunan, China |
| Model | Dr-T9020 |
| Instrument Type | Laboratory Benchtop Analyzer |
| Measurement Principle | Optical (LED-based Photometry) + Electrochemical (Galvanic/Clark-type DO Sensor) |
| Measurement Range (DO) | 0–20 mg/L |
| Accuracy (DO) | ≤ ±5% FS |
| Repeatability (DO) | ≤ ±2% FS |
| Detection Limit (DO) | Not Specified |
| Wavelength Range | 340–900 nm |
| Wavelength Accuracy | ±1 nm |
| Spectral Bandwidth | 4 nm |
| Absorbance Resolution | 0.001 Abs |
| Photometric Stability | ≤ ±0.005 Abs/20 min |
| Preloaded Calibration Curves | 1000+ |
| Data Storage Capacity | 1,000,000 measurements |
| Display | 8-inch HD capacitive touchscreen |
| Interface Language | Chinese (English optional) |
| Sample Holders | Rotatable 16-mm tube position + dual cuvette positions (10 mm & 30 mm pathlength) + 4 independent digital electrode ports |
| Power Supply | AC 100–240 V, 50/60 Hz |
| Dimensions (W×D×H) | 392 × 315 × 170 mm |
| Weight | 4.4 kg |
| Brand | Doctor Water |
|---|---|
| Origin | Hunan, China |
| Model | Dr-M1204P |
| Instrument Type | Portable |
| Measurement Principle | Electrochemical (Clark-type polarographic sensor) |
| Measurement Range | 0–50 mg/L |
| Accuracy | ±1% FS |
| Resolution | 0.001 mg/L |
| Calibration | Two-point calibration (air-saturated water & zero-oxygen solution) |
| Detection Limit | 0.001 mg/L |
| Temperature Compensation | Automatic (0–50 °C) |
| Display | 5-inch HD color TFT touchscreen |
| Data Storage | Up to 1,000,000 records |
| Power Supply | Rechargeable Li-ion battery + USB-C AC adapter |
| Electrode Protection Rating | IP68 |
| Operating Environment | 0–50 °C, ≤85% RH (non-condensing) |
| Electrode Cable Length | Standard 3–5 m (customizable) |
| Multi-parameter Capability | Supports simultaneous or sequential measurement of DO, pH, EC, TDS, ORP, turbidity, temperature, salinity, chlorophyll-a, phycocyanin, suspended solids, free chlorine, COD, ammonia nitrogen, oil-in-water |
| Brand | DoctorWater |
|---|---|
| Origin | Hunan, China |
| Model | Dr-M1104 |
| Portability | Portable |
| Measurement Principle | Electrochemical (Clark-type polarographic sensor) |
| Range | 0–50 mg/L |
| Accuracy | ±1% FS |
| Detection Limit | 0 mg/L |
| Display | 8-inch HD color TFT touchscreen |
| Electrode Interface | 6 independent digital electrode ports (customizable to 8–12) |
| Data Storage | 1,000,000 measurement records |
| Power Supply | Rechargeable Li-ion battery + AC adapter |
| IP Rating | IP68 |
| Operating Environment | 0–50 °C, ≤85% RH (non-condensing) |
| Electrode Cable Length | 3–5 m (customizable) |
| Auto Temperature Compensation | Yes |
| Reading Modes | Real-time, Timed, Interval |
| Data Output | USB interface |
| Built-in Thermal Printer | Yes |
| Language Support | English & Chinese |
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