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| Brand | Leici |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Original Equipment Manufacturer (OEM) |
| Region of Manufacture | Domestic (China) |
| Model | DWS-296 |
| Instrument Type | Benchtop Laboratory Analyzer |
| Measurement Principle | Gas-Sensing Ion-Selective Electrode (ISE) Method |
| Measurement Range | 0.05–1000 mg/L NH₃–N |
| Accuracy | ±1% of reading |
| Detection Limit | 0.05 mg/L |
| Analysis Time | 5–10 minutes per sample |
| Throughput | 1 sample per run |
| Display | LCD with Chinese GUI |
| Data Storage | 200 measurement records |
| Calibration | 2-point calibration supported |
| Connectivity | USB interface for PC communication via proprietary software |
| Temperature Control | Integrated thermostatic system (0.0–40.0 °C) |
| Measured Parameters | pN (–log[NH₃]), mV, NH₃–N concentration (mg/L), temperature (°C) |
| Electronic Unit Error | pN ±0.01 pN ±1 digit |
| Stability | ≤±0.01 pN / 3 h |
| Power Supply | Control unit: 9 V DC, 500 mA (center-positive) |
| Measurement unit | AC 220 V ±10%, 50 Hz ±1 Hz |
| Dimensions & Weight | Control unit: 300 × 220 × 80 mm, 1 kg |
| Measurement unit | 370 × 380 × 510 mm, 13 kg |
| Brand | Leici |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Regional Origin | Domestic (China) |
| Model | DGB-422 |
| Instrument Type | Portable |
| Measurement Principle | Colorimetry |
| Measurement Range | 0.000–500.0 mg/L |
| Accuracy | ±5 mg/L |
| Display | Backlit LCD with Adjustable Contrast & Backlight Duration |
| Protection Rating | IP65 |
| Calibration | Up to 5-point calibration |
| Data Management | GLP-compliant storage, recall, deletion, and print export |
| Power Supply | 4 × AA alkaline batteries or USB-powered |
| Interface | USB for PC/printer connectivity |
| Operating Environment | 5–35 °C, 0–85% RH |
| Dimensions | 220 × 85 × 50 mm |
| Weight | ~0.4 kg |
| Cuvette Specification | Ø16 mm × 100 mm, 10 mL capacity |
| Brand | Leici |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Original Equipment Manufacturer (OEM) |
| Country of Origin | China |
| Model | DWG-8002A |
| Instrument Type | Online Analyzer |
| Measurement Principle | Ammonia Gas-Sensing Electrode Method |
| Measurement Range | 0.05–1000.00 mg/L NH₃-N |
| Accuracy | ±0.2 mg/L (≤2.00 mg/L) |
| Repeatability | ≤2.0% (0.10–10.00 mg/L), ≤5.0% (10.00–1000.00 mg/L) |
| Drift (24 h) | ≤0.02 mg/L (low range), ≤2% (high range) |
| Minimum Detection Limit | ≤0.15 mg/L |
| Output Signal | Isolated 4–20 mA DC (max. load 600 Ω), RS-485 Modbus RTU |
| Data Storage | 4000 measurement records, 500 calibration logs |
| Power Supply | AC 220 V ±10%, 50 Hz |
| Dimensions (L×W×H) | 470 × 325 × 700 mm |
| Weight | ~32 kg (dry) |
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