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| Brand | Lohand |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Direct Manufacturer |
| Product Origin | Domestic (China) |
| Model | LH-T3NHN |
| Instrument Type | Laboratory Benchtop Analyzer |
| Measurement Principle | Colorimetric Method (Nesslerization or Salicylate, per HJ 535–2009) |
| Measurement Range | 0–160 mg/L NH₃–N (multi-range segmented calibration) |
| Accuracy | ≤ ±8% of reading (at mid-range, per HJ 535–2009 validation protocol) |
| Display | 3.5-inch high-resolution color TFT LCD with analog-style UI |
| Light Source | Long-life cold LED source with narrow-band interference optical filtering (rated lifetime ≥100,000 hours) |
| Data Storage | Internal non-volatile memory for up to 5,000 measurement records (timestamp + numeric result) |
| Sample Vessels | Compatible with both 16-mm round glass cuvettes and 10-mm square quartz or optical-grade plastic cuvettes |
| Calibration Options | 15 pre-programmed calibration curves |
| Compliance | Designed and validated in accordance with HJ 535–2009 “Determination of Ammonia Nitrogen in Water—Nessler Reagent Spectrophotometric Method” |
| Brand | Lianhua Technology |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Direct Manufacturer |
| Product Origin | Domestic (China) |
| Model | LH-P3NHN |
| Instrument Type | Portable |
| Measurement Principle | Colorimetric Method (Nesslerization) |
| Measurement Range | 0–200 mg/L NH₃–N (multi-range segmented) |
| Accuracy | ≤ ±10% of reading |
| Compliance Standards | HJ 536–2009, HJ 1535–2009 |
| Display | 3.5-inch color TFT LCD with dial-style UI |
| Calibration | Optical intensity calibration & curve-based calibration |
| Built-in Calibration Curves | 30 preloaded, user-editable and user-calibratable |
| Reagent Compatibility | Pre-formulated reagent kits (LH-series) included |
| Over-range Indication | Visual red alert on dial interface when exceeding upper limit |
| Brand | Lianhua Tech |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Manufacturer |
| Product Origin | Domestic (China) |
| Model | 5B-6D(V10) |
| Instrument Type | Laboratory Analyzer |
| Measurement Principle | Colorimetry (Nessler and Salicylate Methods) |
| Measurement Range | 0–160 mg/L NH₃-N |
| Accuracy | ≤ ±5% |
| Measurement Time | 10–40 minutes |
| Batch Processing Capacity | Configurable (via optional cuvette racks or tube holders) |
| Display | 5.6-inch color touchscreen |
| Data Storage | Up to 12,000 measurement records |
| Data Export | USB port and infrared interface |
| Output | Built-in thermal printer |
| Calibration | Auto-curve generation and storage using standard solutions |
| Curve Customization | User-defined calibration curve fitting supported |
| Reagent Compatibility | Pre-packaged Nessler reagents |
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