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| Brand | Hach |
|---|---|
| Origin | Imported |
| Manufacturer Type | Manufacturer |
| Instrument Type | Portable |
| Measurement Principle | Coulometric Titration (Acidic/Alkaline KMnO₄ Method) |
| Measurement Range | 0–5000 mg/L as O₂ |
| Accuracy | ±2% of full scale |
| Repeatability | ±2% of full scale |
| Detection Limit | 0.2 mg/L |
| Typical Analysis Time | 15 minutes |
| Batch Capacity | Single-sample per run |
| Brand | Hach |
|---|---|
| Origin | Imported |
| Manufacturer Type | Manufacturer |
| Instrument Type | Laboratory |
| Measurement Principle | UV Absorption Spectrophotometry (Portable) |
| Wavelength | 420 nm |
| Range | 0.7–15,000 mg/L COD |
| Accuracy | ≤ ±10% |
| Repeatability | ≤ ±5% |
| LOD | 0.1 mg/L |
| Analysis Time | 20 min per batch |
| Batch Capacity | 15 or 30 samples |
| Brand | HACH |
|---|---|
| Origin | Imported |
| Manufacturer Type | Manufacturer |
| Instrument Type | Online Analyzer |
| Measurement Principle | Potassium Dichromate Digestion Method (Online) |
| Wavelengths | 420 nm (Low Range), 610 nm (High Range) |
| Measurement Range | 10–5000 mg/L COD |
| Accuracy | ±8% of reading |
| Repeatability | ≤3% RSD |
| Detection Limit | 10 mg/L COD |
| Cycle Time | 20 min (standard digestion time |
| Operation Mode | Continuous measurement |
| Compliance | GB 11914–1989, ASTM D1252–2022 (Method B), ISO 6060:1989 |
| Brand | HACH |
|---|---|
| Origin | Imported |
| Manufacturer Type | Manufacturer |
| Instrument Type | Online Analyzer |
| Measurement Principle | UV-Persulfate Oxidation with NDIR Detection |
| Measurement Range | 0–5 to 20,000 mg/L TOC (selectable ranges) |
| Accuracy | ±2% of full scale at 25°C (non-diluted) |
| Repeatability | ±2% of reading at 25°C (non-diluted) |
| Detection Limit | <0.015 mg/L TOC (in 0–5 mg/L range, at 25°C) |
| Response Time | T90 < 8 minutes |
| Carrier Gas | CO₂-free air or nitrogen, 2.8–6.2 bar, 20–200 mL/min |
| Sample Temperature | 2–70°C |
| Operating Temperature | 5–40°C |
| Analog Outputs | Two isolated 4–20 mA outputs (user-configurable range) |
| Alarm Functions | Five configurable alarms (TOC concentration, system fault, shutdown, etc.) |
| Communication Interface | RS-232 or RS-485 (Modbus RTU / ASCII, CSV export) |
| Power Supply | 115/230 VAC, 50/60 Hz |
| Sample Inlet/Outlet | 1/4" OD compression fittings |
| Certifications | CE, UL, CSA |
| Brand | Hach |
|---|---|
| Origin | Imported |
| Manufacturer Type | Manufacturer |
| Instrument Type | Benchtop Laboratory Analyzer |
| Measurement Principle | Dichromate Digestion Method (Portable-Compatible Design) |
| Wavelength Options | 420 nm and 610 nm |
| Wavelength Accuracy | ±1 nm |
| Photometric Linearity | ±0.002 A (0–1 A) |
| Photometric Repeatability | ±0.005 A (0–1 A) |
| Photometric Accuracy | ±0.005 A at 1.0 ABS |
| Stray Light | <1.0% at 400 nm |
| Light Source | LED |
| Detector | Silicon Photodiode |
| Display | 4-digit LCD, 15 mm character height |
| Optical Range | 0–2 A |
| Readout Modes | % Transmittance, Absorbance, Concentration |
| Operating Temperature | 0–50 °C |
| Storage Temperature | −20–60 °C |
| Humidity Limit | 80% RH at 40 °C |
| Ingress Protection | IP41 |
| Power Supply | 190–240 VAC/50 Hz adapter (6 VDC output) or 4 × AA alkaline batteries |
| Battery Life | Up to 6 months (typical usage) |
| Dimensions | 24.0 × 19.8 × 12.0 cm |
| Weight | 2.0 kg |
| Batch Capacity | 0–30 samples per run |
| Digestion Time | 20–120 min |
| Detection Limit & Range | Defined by reagent vial selection (e.g., 0–150 mg/L, 0–1500 mg/L) |
| Measurement Error | ≤8% (15–150 mg/L) |
| Data Interface | RS232 serial port for printer or PC connectivity |
| Brand | Hach |
|---|---|
| Origin | Imported |
| Manufacturer Type | Manufacturer |
| Model | CODmax III |
| Instrument Type | Online Analyzer |
| Measurement Principle | Potassium Dichromate Digestion Method (High-Temperature Closed-System Digestion) |
| Detection Wavelength | LED at 620 nm |
| Measurement Range | 10.0–5,000 mg/L COD |
| Accuracy | ±10% (10.0–39.9 mg/L), ±6% (40.0–99.9 mg/L), ±3% (100.0–5,000.0 mg/L) |
| Optical Metrology | Multi-stage photometric dosing system |
| Sample Introduction | Precision piston pump with >12-month service life |
| Maintenance Interval | Extended via anti-fouling measurement cycle |
| Diagnostics | Integrated Prognosys predictive diagnostics and Diagnose self-diagnostic engine |
| Compliance | Fully aligned with HJ 377–2019, HJ 35X–2019, and method-equivalent to HJ 828–2017 |
| Brand | Hach |
|---|---|
| Origin | Imported |
| Manufacturer Type | Manufacturer |
| Instrument Type | Online Analyzer |
| Measurement Principle | Potassium Dichromate Digestion Method |
| Measurement Range | 10–5,000 mg/L COD |
| Repeatability | ≤5% |
| Measurement Cycle Time | 20 min (to >90% response) |
| Batch Capacity | 15 or 30 samples per cycle |
| Digestion Temperature | 175 °C |
| Digestion Duration Options | 3–120 min (selectable in 1-min increments) |
| Calibration Interval | User-defined automatic schedule |
| Cleaning Interval | User-defined automatic schedule |
| Maintenance Requirement | ~1 hour per month |
| Analog Outputs | Two 4–20 mA isolated outputs |
| Relay Outputs | Two 24 VDC / 1 A digital relays |
| Communication Interfaces | RS232, MODBUS RTU over RS485, Profibus DP (optional) |
| Data Storage | 2,000 measurement records |
| Operating Ambient Temperature | +5 to +40 °C |
| Power Supply | 220 VAC ±10%, 50–60 Hz |
| Power Consumption | ~100 VA |
| Dimensions (W×H×D) | 550 × 810 × 390 mm |
| Weight | ~25 kg (excluding reagents) |
| Brand | Hach |
|---|---|
| Model | CODmax III |
| Type | Online Analyzer |
| Measurement Principle | Potassium Dichromate Digestion Method |
| Range | 10–5000 mg/L COD |
| Accuracy | ±10% |
| Repeatability | ≤5% |
| Detection Limit | 5 mg/L |
| Cycle Time | 2 hours per sample |
| Batch Capacity | 15 samples per run |
| Compliance | Meets Chinese Environmental Monitoring Standard HJ 399-2017 and ISO 6060 |
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