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:
| Modell des Produkts | DO-200 | DO-210 | DO-230 |
| Working principle | Fluorescence method | Fluorescence method | Fluorescence method |
| Messbereich | (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 |
| Schutzniveau | IP68 | IP68 | IP68 |
| Kommunikationsschnittstelle | 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, Kabel 10 Meter (kann angepasst werden) | (φ12*115)mm, cable 10 meters (can be customized) | Φ12*220mm |
| Material | 316L stainless steel /PVC/ titanium alloy | 316L-Edelstahl/Titanlegierung | Edelstahl 316L |
| Gewicht | 0,5 kg | 0,1kg | 0,1kg |
| Befestigungsgewinde | Upper end NPT3/4 thread | / | VP8 fittings & PG13.5 threads |
| Betriebsspannung | (9~36)V DC | (9~36)V DC | (9~36)V DC |
| Energieverbrauch | 0.4 W | 0.4 W | 0.4 W |
| MTBF | ≥1440h/time | ≥1440h/time | Membrane cap high temperature sterilization 30pcs |
| Zeitraum der Kalibrierung | 6 ~ 12 months | 6 ~ 12 months | 6 ~ 12 months |
| Arbeitsumfeld | (0~50) °C | (0~50) °C | 0~130℃ |
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