TriOS OPUS
OPUS is the new generation of spectral sensors for online measurement of nitrogen and carbon compounds. Through the analysis of a full spectrum, OPUS is able to deliver reliable readings for NO3-N, NO2-N, organic ingredients (CODeq, BODeq, DOCeq, TOCeq), and a number of other parameters.
OPUS features the new TriOS G2 interface, allowing fast and easy configuration of sensors by using a web browser. Integration into existing process control systems and external data loggers has never been easier.
With the optional battery pack, mobile applications are also feasible. WiFi connectivity allows laptops, tablets or smartphones to be easily used for control without any special application software or app installation.
Technical specifications
Measures
| Measurement technology | Light source: Xenon flash lamp; |
| Detector: High-end miniature spectrometer | |
| 256 Channels | |
| 200 to 360 nm | |
| 0.8 nm/pixel | |
| Measurement principle | Attenuation, spectral analysis |
| Optical path | 0.3 mm, 1 mm, 2 mm, 5 mm, 10 mm, 50 mm |
| Parameter | See parameter list p. 3 |
| Measuring range | |
| Measurement accuracy | |
| Turbidity compensation | Yes |
| Data logger | ~ 2 GB |
| T100 response time | 2 min |
| Measurement interval | ≥ 1 min |
| Housing material | Stainless steel (1.4571/1.4404), titanium (3.7035), |
| Deep Sea Version: titanium (3.7035) | |
| Dimensions | (L x Ø) ~ 470 mm x 48 mm (10 mm path) |
| Deep Sea Version: ~ 511 x 59 mm | |
| Weight | stainless steel ~ 3 kg (with 10 mm path) |
| titanium ~ 2 kg | |
| Deep Sea Version: ~ 4 kg | |
| Interface, digital | Ethernet (TCP/IP) |
| RS-232 or RS-485 (Modbus RTU) | |
| Power consumption | ≤ 8 W |
| Power supply | 12…24 VDC (± 10 %) |
| Maintenance effort | ≤ 0.5 h/month (typical) |
| Calibration/maintenance interval | 24 months |
| System compatibility | Modbus RTU |
| Warranty | 1 year (EU: 2 years) US: 2 years |
| Max.pressure | with SubConn 30 bar |
| Deep Sea Version: 600 bar | |
| with fixed cable 3 bar | |
| in FlowCell 1 bar, 2…4 L/min | |
| Protection type | IP68 |
| Sample temperature | +2…+40 °C |
| Ambient temperature | +2…+40 °C |
| Storage temperature | -20…+80 °C |
| Inflow velocity | 0.1…10 m/s |
Parameter list
| Path | (mm) Parameter | Measurement principle | Unit | Measuring range | Detectionlimit | Limit of determination | Precision | Accuracy* |
| 1 | Nitrate NO3-N | Spectral | mg/L | 0…100 | 0.3 | 0.5 | 0.05 | ± (5 % + 0.1) |
| Nitrite NO2-N | Spectral | mg/L | 0…150 | 0.5 | 1.2 | 0.12 | ± (5 % + 0.1) | |
| CODeq | Spectral | mg/L | 0…2200*** | 30 | 100 | 10 | ||
| BODeq | Spectral | mg/L | 0…2200*** | 30 | 100 | 10 | ||
| DOCeq | Spectral | mg/L | 0…1000 | 5 | 10 | 1 | ||
| TOCeq | Spectral | mg/L | 0…1000 | 5 | 10 | 1 | ||
| TSSeq | Spectral | mg/L | 0…1500 | 60 | 200 | 20 | ||
| KHP | Spectral | mg/L | 0…4000 | 5 | 10 | 1 | ± (5 % + 2) | |
| SAC254 | Single wavelength | 1/m | 0…2200 | 15 | 50 | 5 | ||
| COD-SACeq** | Single wavelength | mg/L | 0…3200 | 22 | 73 | 7.3 | ||
| BOD-SACeq** | Single wavelength | mg/L | 0…1050 | 7.2 | 24 | 2.4 |
