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:
どこでだ:
| 製品モデル | DO-200 | DO-210 | DO-230 |
| 動作原理 | Fluorescence method | Fluorescence method | Fluorescence method |
| 測定範囲 | (0~20)mg/L &can be customized | (0~20)mg/L &can be customized | (0~20)mg/L &can be customized |
| 再現性 | ±0.2mg/L | ±0.2mg/L | ±0.2mg/L |
| 測定精度 | ±0.2mg/L | ±0.2mg/L | ±0.2mg/L |
| ドリフト(24時間) | ±0.2mg/L | ±0.2mg/L | ±0.2mg/L |
| 決議 | 0.01mg/L | 0.01mg/L | 0.01mg/L |
| 応答時間 | <1min | <1min | <1min |
| 保護レベル | IP68 | IP68 | IP68 |
| 通信インターフェース | 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 |
| 寸法 | (φ33*224)mm、ケーブル10m(カスタマイズ可能) | (φ12*115)mm, cable 10 meters (can be customized) | Φ12*220mm |
| 素材 | 316L stainless steel /PVC/ titanium alloy | 316Lステンレス/チタン合金 | 316Lステンレス鋼 |
| 重量 | 0.5kg | 0.1kg | 0.1kg |
| 取り付けネジ | Upper end NPT3/4 thread | / | VP8 fittings & PG13.5 threads |
| 動作電圧 | (9~36)V DC | (9~36)V DC | (9~36)V DC |
| エネルギー消費 | 0.4 W | 0.4 W | 0.4 W |
| MTBF | ≥1440h/回 | ≥1440h/回 | Membrane cap high temperature sterilization 30pcs |
| 校正期間 | 6 ~ 12 months | 6 ~ 12 months | 6 ~ 12 months |
| 職場環境 | (0~50) °C | (0~50) °C | 0~130℃ |
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