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| Brand | Macherey-Nagel (Germany) |
|---|---|
| Origin | Germany |
| Model | PF-3 919342 |
| Instrument Type | Portable |
| Measurement Principle | UV Absorption Spectrophotometry |
| Wavelength | 365 nm |
| Measurement Range | 2–60,000 mg/L COD |
| Repeatability | High precision |
| Detection Limit | Low (optimized for high-sensitivity UV absorption) |
| Measurement Time | <5 seconds per sample |
| Sample Throughput | Single-sample mode |
| Optical System | LED-based photometer with interference filters (365/450/595 nm) |
| Wavelength Accuracy | ±2 nm |
| Bandwidth (FWHM) | 10–12 nm |
| Detector | Silicon photodiode |
| Cuvette Format | 16 mm round tubes |
| Data Storage | 50 measurement records |
| Display | Graphical LCD (64 × 128 pixels) |
| Operating Temperature | 10–40 °C |
| Relative Humidity | ≤80% RH (non-condensing) |
| Power Supply | 3×AA batteries (alkaline or rechargeable), USB bus power, optional internal rechargeable battery |
| Enclosure Rating | IP68 |
| Dimensions | 170 × 95 × 68 mm |
| Weight | 0.5 kg |
| Compliance | CE-marked |
| Warranty | 12 months |
| Brand | WTW |
|---|---|
| Origin | Germany |
| Model | WTW OxiTop®-i IS 6 BOD |
| Instrument Type | Laboratory Benchtop Analyzer |
| Measurement Principle | Manometric Respirometry (CO₂-absorbed pressure differential method) |
| Measurement Range | 0–40 mg/L (standard), up to 4,000 mg/L (via sample dilution or reduced volume) |
| Accuracy | <10% deviation from reference value |
| Repeatability | ≤ ±2.8% RSD |
| Measurement Duration | Programmable from 1 to 7 days |
| Sample Capacity | 6 independent channels |
| Display | Individual LCD graphic display per sensor head |
| Temperature Compensation | Automatic thermal equilibration delay (1–3 h) |
| Units | mg/L O₂, ΔhPa, hPa, digit |
| Compliance | Designed for ISO 5815-1:2019, EN 25815, and APHA Standard Methods 5210 B |
| Brand | WTW |
|---|---|
| Origin | Germany |
| Model | C3/25 |
| Instrument Type | Portable COD Analyzer Compatible |
| Measurement Range | 10–150 mg/L |
| Accuracy | ±5% (vs. certified COD standard) |
| Repeatability | ≤3% RSD |
| LOD | 10 mg/L |
| Analysis Time | 2 hours |
| Batch Capacity | 25 tests per kit |
| Compliance | EPA 410.4 & DIN 38409-H41 validated methods |
| Brand | Hach |
|---|---|
| Origin | USA |
| Model | DR1010 COD |
| Instrument Type | Portable |
| Measurement Principle | UV-Visible Absorption Spectrophotometry |
| Wavelengths | 420 nm and 610 nm |
| Photometric Accuracy | ±0.005 A at 1.0 ABS |
| Photometric Repeatability | ±0.005 A (0–1 A) |
| Wavelength Accuracy | ±1 nm |
| Photometric Linearity | ±0.002 A (0–1 A) |
| Detector | Silicon Photodiode |
| Power Supply | 190–240 V AC/50 Hz or 4×AA Alkaline Batteries |
| Environmental Rating | IP41 |
| Output Interface | RS232 Serial Port |
| Readout Modes | % Transmittance, Absorbance, Concentration |
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