- +86 571 8501 2111
- fpi-online@fpi-inc.com
- 459 Qianmo Road, Bezirk Binjiang, Hangzhou, China
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The dissolved oxygen online sensor uses the fluorescence method to detect dissolved oxygen in water. It features a built-in temperature sensor for automatic temperature compensation. Manual compensation for atmospheric pressure and salinity is available, with one-button switching between national and industry standards. The sensor uses an RS485 interface and supports the standard Modbus protocol.
During the interaction between dissolved oxygen in water and fluorescent substances, both the fluorescence intensity decreases and the fluorescence lifetime shortens. This fluorescence quenching can be described by the Stern–Volmer equation:
Wo:
| Product model | DO-200 | DO-210 | DO-230 |
| Working principle | Fluorescence method | Fluorescence method | Fluorescence method |
| Measurement range | (0~20)mg/L &can be customized | (0~20)mg/L &can be customized | (0~20)mg/L &can be customized |
| Wiederholbarkeit | ±0.2mg/L | ±0.2mg/L | ±0.2mg/L |
| Measurement accuracy | ±0.2mg/L | ±0.2mg/L | ±0.2mg/L |
| Drift (24h) | ±0.2mg/L | ±0.2mg/L | ±0.2mg/L |
| Entschließung | 0.01mg/L | 0.01mg/L | 0.01mg/L |
| Reaktionszeit | <1min | <1min | <1min |
| Protection level | IP68 | IP68 | IP68 |
| Communication interface | RS485, standard Modbus protocol baud rate 4800, 9600, 19200, 38400, 57600, 115200 | RS485, standard Modbus protocol baud rate 4800, 9600, 19200, 38400, 57600, 115200 | RS485, standard Modbus protocol baud rate 4800, 9600, 19200, 38400, 57600, 115200 |
| Abmessungen | (φ33*224)mm, cable 10 meters (can be customized) | (φ12*115)mm, cable 10 meters (can be customized) | Φ12*220mm |
| Material | 316L stainless steel /PVC/ titanium alloy | 316L stainless steel/titanium alloy | 316L stainless steel |
| Gewicht | 0.5kg | 0.1kg | 0.1kg |
| Mounting threads | Upper end NPT3/4 thread | / | VP8 fittings & PG13.5 threads |
| Operating voltage | (9~36)V DC | (9~36)V DC | (9~36)V DC |
| Energy consumption | 0.4 W | 0.4 W | 0.4 W |
| MTBF | ≥1440h/time | ≥1440h/time | Membrane cap high temperature sterilization 30pcs |
| Calibration period | 6 ~ 12 months | 6 ~ 12 months | 6 ~ 12 months |
| Work environment | (0~50) °C | (0~50) °C | 0~130℃ |
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