Product Overview
The SX-CRCNA Series residual chlorine sensor uses a controlled negative-voltage pulse applied between the polarized electrode and reference electrode to selectively promote the electrochemical reaction of free chlorine. The resulting current signal is proportional to free chlorine concentration, enabling accurate measurement through signal acquisition and analysis. The sensor provides high selectivity, low maintenance requirements, long service life, and reliable performance.
Main Features
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RS-485 transmission interface, Modbus-RTU communication protocol, two-channel communication
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Power supply and output isolation design to ensure electrical safety
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Built-in protection circuit, enhancing anti-interference ability to suitable for harsh environments
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Simple communication protocol that can output additional electrode diagnostic information
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Built-in calibration parameters for easy on-site use and secondary calibration
Product Application
Industries Served
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Free (Residual) Chlorine Monitoring in
Water Treatment
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Disinfection Process Monitoring
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Technical Data
| Measurement | |
| Product Type | Residual Chlorine Sensor |
| Measurement Principle | Constant voltage method |
| Measurement Range | 0–20 mg/L |
| Accuracy & Calibration | |
| Accuracy | ±0.02 mg/L |
| Resolution | 0.01 mg/L |
| Calibration | Built-in calibration parameters; on-site secondary calibration supported |
| Power & Communication | |
| Supply Voltage | DC 9–27 V, >1 A |
| Power Consumption | Approx. 0.5 W |
| Digital Communication | RS-485 / Modbus-RTU |
| Isolation Strength | 2500 Vrms |
| Environmental Conditions | |
| Operating Temperature | −10 to +110 °C |
| Required Flow Rate | 20–40 L/h |
| Ingress Protection | IP68 |
| Mechanical & Materials | |
| Housing Material | 316L Stainless Steel |
| Dimensions | Φ13 mm × 120 mm, excluding cable |
Certifications & Compliance
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