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| Brand | TriOS |
|---|---|
| Origin | Germany |
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | LISA 254 BOD |
| Instrument Type | Online BOD Analyzer |
| Measurement Principle | Dissolved Oxygen (DO)-Based Optical Correlation |
| Measurement Range | 0–700 mg/L BODeq |
| Detection Limit | 0.1 mg/L BODeq |
| Accuracy | ±5% of reading |
| Single Measurement Time | 1 min |
| Repeatability | ±2% RSD |
| Light Path Options | 1, 2, 5, 10, or 50 mm |
| Dual-Channel Turbidity Compensation | Yes (530 nm reference channel) |
| Output Interfaces | Ethernet (TCP/IP), RS-232/RS-485 (Modbus RTU), 4–20 mA analog |
| Power Supply | 12–24 VDC (±10%), ≤1 W |
| Operating Temperature | 2–40 °C (sample & ambient) |
| Pressure Rating | Up to 30 bar (SubConn), 3 bar (fixed cable), 1 bar (flow cell) |
| Enclosure Material | Stainless Steel 1.4571 / 1.4404 or Titanium Grade 3.7035 |
| IP Rating | IP68 |
| Dimensions (10 mm path) | 300 mm × 48 mm |
| Weight (10 mm, stainless) | 1.6 kg |
| Data Storage | 2 MB internal |
| Response Time | 4 s |
| Measurement Interval | 2 s |
| UV Source | Dual LED (254 nm + 530 nm) |
| Detector | Filtered Photodiode |
| SAC254 Calibration | Traceable to NIST-traceable standards |
| Brand | CTG |
|---|---|
| Origin | United Kingdom |
| Model | UviLux-BOD |
| Instrument Type | Portable BOD Analyzer |
| Measurement Principle | UV-Vis Excitation of Tryptophan Fluorescence (DO-correlated surrogate method) |
| Measurement Range | 0–35 mg/L BOD₅ equivalent |
| Detection Limit | 0.1 mg/L |
| Accuracy | ±1% of reading |
| Single Measurement Time | 5 s |
| Repeatability | ±3% RSD |
| Output Interfaces | RS-232, Analog (4–20 mA), SDI-12 |
| Compliance | Designed for field-deployable environmental monitoring per ISO 5815-1:2019 (BOD reference methodology context), EPA Method 405.1 (fluorescence-based surrogates), and EU Bathing Water Directive 2006/7/EC monitoring frameworks |
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