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- fpi-online@fpi-inc.com
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The residual chlorine online sensor is an online constant-voltage type sensor. It features a built-in flow stabilization cell that effectively eliminates the impact of flow rate on sensor performance. Equipped with integrated temperature and pH sensors, it supports automatic compensation for water temperature and pH. The sensor adopts an RS485 interface and standard Modbus protocol for easy integration.
A constant potential is applied between the measuring and reference electrodes to form a micro-current measurement system consisting of two platinum electrodes (working and counter electrodes) and a reference electrode. Hypochlorous acid undergoes redox reactions on the surface of the working electrode, generating a current signal. The residual chlorine concentration is calculated based on the relationship between current intensity and chlorine concentration. Meanwhile, the system measures the water temperature and pH, and performs signal compensation to obtain an accurate residual chlorine concentration in the water.
| Product model | FCl-200 | ||
| Working principle | Constant voltage glass electrode method | ||
| Measurement factors | Residual chlorine | pH | temperature |
| Measurement range | (0-20) mg/L | 0~14 | (0~50)℃ |
| Measurement accuracy | ±10%； When the concentration is less than 0.5mg/L± 0.05mg/L | <0.1pH | 0.1℃ |
| pH compensation range | 6~9 | ||
| Detection limit | 0.02mg/L | ||
| resolution | 0.01mg/L | ||
| Response time | ≤10s | ||
| Communication interface | RS485, standard Modbus protocol | ||
| Dimensions: | （250*203*165）mm | ||
| Material | Electrode: platinum ring glass; Detection cell: acrylic | ||
| Operating voltage | 24V DC | ||
| MTBF | ≥ 1440h/time | ||
| power consumption | 0.3w | ||
| Minimum flow rate | 0.5-1.2L/min | ||
| Cleaning method: | Compressed air/raw water recoil | ||
| Calibration period | 1 month | ||
| Work environment | (0~50)℃ | ||
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