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| Brand | Leici |
|---|---|
| Origin | Shanghai, 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 |
| Data Storage | 4000 measurement records + 500 calibration logs |
| Power Supply | AC 220 V ±10%, 50 Hz |
| Dimensions | 470 × 325 × 700 mm (L×W×H) |
| Weight | ~32 kg (dry) |
| Brand | Leici |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | DGB-422 |
| Instrument Type | Portable |
| Measurement Principle | Colorimetric Method (LED-based Photometry) |
| Measurement Range | 0.000–500.0 mg/L (Ammonia Nitrogen) |
| Accuracy | ±5 mg/L |
| Display | Backlit LCD with Adjustable Contrast & Timeout |
| Protection Rating | IP65 |
| Power Supply | 4 × AA Alkaline Batteries or USB 5V DC |
| Dimensions | 220 × 85 × 50 mm |
| Weight | ~0.4 kg |
| Operating Environment | 5–35 °C, 0–85% RH (non-condensing) |
| Cuvette Format | 16 mm OD × 100 mm, 10 mL capacity |
| Calibration | Up to 5-point user-defined calibration |
| Data Management | GLP-compliant storage, recall, deletion, and print export via USB |
| Supported Parameters | Ammonia Nitrogen, Total Hardness (Ca²⁺/Mg²⁺), Urea, Total Phosphorus, COD (Permanganate Index), Residual Chlorine, Total Chlorine, Chlorine Dioxide, Aluminum, etc. |
| Brand | Leici |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Authorized Distributor |
| Region of Manufacture | Domestic (China) |
| Model | DWS-296 |
| Price | USD 1,530 (approx.) |
| 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 |
| Measurement Time | 5–10 minutes per sample |
| Sample Throughput | 1 sample per assay |
| Display | LCD with Chinese GUI |
| Readout Modes | Smart-Read (adaptive equilibrium), Timed-Read (fixed-interval or endpoint), Cont-Read (continuous kinetic monitoring) |
| Data Storage | Up to 200 measurement sets with timestamp, pN, mV, temperature, and NH₃–N concentration |
| Power Supply | Control Unit: 9 VDC, 500 mA (center-positive) |
| Measurement Unit | AC 220 V ±10%, 50 Hz |
| Dimensions & Weight | Control Unit: 300 × 220 × 80 mm, 1 kg |
| Measurement Unit | 370 × 380 × 510 mm, 13 kg |
| Interface | RS-232 serial port compliant with EIA/TIA-232 standard |
| Software Compatibility | REX Data Acquisition Software (Windows-based) |
| Printer Support | TP-16 thermal printer (optional) |
| Electrode Type | Integrated composite ammonia gas-sensing ISE with hydrophobic membrane and internal buffer |
| Temperature Compensation | Automatic (0.0–40.0 °C), NTC thermistor-based |
| Environmental Rating | Indoor laboratory use only, IP20 |
| Compliance | Designed in accordance with GB/T 27025–2019 (equivalent to ISO/IEC 17025), JJG 822–2019 (Chinese metrological verification regulation for ammonia analyzers) |
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