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| Brand | TriOS |
|---|---|
| Origin | Germany |
| Model | LISA 254 |
| Instrument Type | Online Analyzer |
| Measurement Principle | UV Absorption Spectrophotometry at 254 nm |
| Wavelength | 254 nm |
| Measurement Range | 10–5000 mg/L COD<sub>eq</sub> |
| Accuracy | ±5% of reading |
| Repeatability | ±5% RSD |
| LOD | 0.01 mg/L COD<sub>eq</sub> |
| Measurement Interval | 1 s |
| Batch Capacity | 15 samples |
| Optical Path Length Options | 1, 2, 5, 10, or 50 mm |
| Turbidity Compensation | Dual-channel (254 nm + 530 nm) |
| Output Interfaces | 4–20 mA analog, Ethernet (TCP/IP), RS-232/RS-485 (Modbus RTU, TriOS protocol) |
| 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 (3.7035) |
| IP Rating | IP68 |
| Dimensions (10 mm path) | 300 mm × 48 mm |
| Weight (10 mm path, stainless steel) | 1.6 kg |
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