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| Brand | Leici |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Regional Classification | Domestic (China) |
| Model | COD-580 |
| Instrument Type | Online Analyzer |
| Measurement Principle | Electrochemical Oxidation (Hydroxyl Electrode Method) |
| Measurement Range | 10.0–1000 mg/L |
| Resolution | 0.1 mg/L |
| Accuracy | ±5% of Full Scale (FS) |
| Repeatability | ≤3% FS |
| Zero Drift | ±5 mg/L per 24 h |
| Span Drift | ±10% per 24 h |
| Power Supply | AC 220 V ±10%, 50 Hz ±1% |
| Dimensions (W×D×H) | 600 × 455 × 720 mm |
| Weight | 50 kg |
| Interface Options | RS-232 standard |
| Display | 7-inch color touchscreen with Chinese UI |
| Brand | LeiCi |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Regional Classification | Domestic (China) |
| Model | DGS-450 |
| Instrument Type | Benchtop Laboratory Analyzer |
| Measurement Principle | Potassium Dichromate Digestion Method (for COD), Nesslerization (for Ammonia-N), Molybdate Blue Spectrophotometry (for Total Phosphorus), Alkaline Potassium Persulfate Digestion with Chromotropic Acid (for Total Nitrogen) |
| Wavelengths | 420 nm, 470 nm, 620 nm, 700 nm |
| COD Range | (0.000–1500) mg/L (extendable to 15,000 mg/L) |
| Ammonia-N Range | (0.000–10.00) mg/L (extendable to 100.0 mg/L) |
| Total Phosphorus Range | (0.000–1.000) mg/L (extendable to 10.00 mg/L) |
| Total Nitrogen Range | (0.000–30.00) mg/L (extendable to 300.0 mg/L) |
| Absorbance Range | (0.000–2.000) Abs |
| Wavelength Accuracy | ±4 nm |
| Transmittance Error | ±2% |
| Photometric Repeatability | ≤0.5% |
| Ammonia-N Accuracy | ±5% |
| COD & Total Phosphorus & Total Nitrogen Accuracy | ±8% (COD & TP), ±1 mg/L (≤10 mg/L TN) or ±5% (>10 mg/L TN) |
| Repeatability (all parameters) | ≤3% |
| Detection Limits | Ammonia-N ≤0.03 mg/L |
| Cell Format | 25 mm cuvette / 16 mm tube |
| Power Supply | AC 100–240 V input, DC 20 V output |
| Dimensions | 302 × 205 × 122 mm |
| Weight | 1.33 kg |
| Data Storage | 500 records per parameter |
| Interface | RS-232, USB-B, U-disk export support |
| Brand | Leichi |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Country of Origin | China |
| Model | COD-582 |
| Instrument Type | Online Analyzer |
| Measurement Principle | Potassium Dichromate Digestion Method (Online) |
| Measurement Range | 10.0–5000 mg/L |
| Accuracy | ±10% or ±5 mg/L (for values ≤50 mg/L) |
| Repeatability | 5% or 5 mg/L (for values ≤100 mg/L) |
| Resolution | 0.1 mg/L (≤100 mg/L), 1 mg/L (>100 mg/L) |
| Zero Drift | ±5 mg/L/24 h |
| Span Drift | ±10%/24 h |
| Power Supply | AC 220 V ±10%, 50 Hz |
| Dimensions (W×D×H) | 550 × 400 × 1680 mm |
| Weight | 50 kg |
| MTBF | ≥360 hours |
| Output | Isolated 4–20 mA DC (configurable upper/lower limits) |
| Communication | RS-232 or RS-485 (selectable) |
| Interface | 7-inch color LCD touchscreen |
| Maintenance Interval | Up to 30 days without service |
| Brand | Leici |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Regional Classification | Domestic (China) |
| Model | COD-572 |
| Price Range | USD 700 – 1,400 (FOB Shanghai) |
| Instrument Type | Benchtop Laboratory Analyzer |
| Measurement Principle | Coulometric Titration (ASTM D1252–04, ISO 8467:1993 compliant) |
| COD Range | (0.0–100.0) mg/L (standard), extendable to (100.0–1000) mg/L via dilution or high-range mode |
| Accuracy | ±2 mg/L (absolute error at ≤100 mg/L) |
| Repeatability | RSD ≤ 2% |
| Power Supply | AC 220 V ±10%, 50 Hz ±1% |
| Dimensions (W×D×H) | 300 × 235 × 100 mm |
| Weight | 3.0 kg |
| Brand | Leici |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Regional Classification | Domestic (China) |
| Model | COD-571 |
| Instrument Type | Benchtop Laboratory Analyzer |
| Measurement Principle | Dichromate Digestion Method (2-hour standard digestion per ISO 6060 / HJ 828–2017) |
| Wavelengths | 420 nm and 620 nm |
| Measurement Ranges | 0–150 mg/L (low-range), 0–1500 mg/L (high-range) |
| Accuracy | ±8% of reading |
| Repeatability | ≤3% RSD |
| Measurement Time | ~20 min post-digestion |
| Throughput | Batch analysis of multiple water samples |
| Absorbance Range | 0.000–2.000 Abs |
| Absorbance Accuracy | ±0.01 Abs or ±5% |
| Absorbance Repeatability | ≤0.005 Abs or 2% |
| Wavelength Accuracy | ±4 nm |
| Transmittance Error | ±2% |
| Transmittance Repeatability | ≤0.5% |
| Cuvette Compatibility | 10 mm square cuvettes and 16 mm round test tubes |
| Data Storage | 2000 measurement records with timestamp, sample ID, dilution factor, and calibration metadata |
| Connectivity | RS-232, USB-B, optional U disk export |
| Power Supply | AC 100–240 V input / DC 24 V output adapter |
| Dimensions | 302 × 205 × 122 mm |
| Weight | 1.33 kg |
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