Free chlorine water sensor
- Reagent-Free Operation: Measures free chlorine or chlorine dioxide without the need for reagents, membranes, or electrolyte replacement.
- Advanced Technology: Utilizes constant voltage method for continuous and accurate water quality monitoring.
- Wide Measuring Range: Available in 0–2 mg/L, 0–5 mg/L, and 0–20 mg/L to suit various application needs.
- Easy Integration: Supports RS485 and Modbus RTU communication, compatible with DC12V~DC24V power supply.
- Versatile Applications: Ideal for municipal water, secondary water supply, disinfection processes, and more, providing reliable real-time data.
Overview
The Free Chlorine Water Quality Sensor utilizes advanced constant voltage technology to continuously and accurately measure free chlorine or chlorine dioxide levels in water samples, without the need for any reagents, membrane, or electrolyte replacement. With a wide measuring range of 0–2 mg/L, 0–5 mg/L, or 0–20 mg/L, and powered by DC12V~DC24V, the sensor features RS485 output with Modbus RTU communication for seamless system integration. Designed for reliability and ease of use, this sensor is widely applied in water supply, secondary supply, municipal networks, disinfection processes, and more, providing customers with accurate and dependable monitoring data for effective water quality management.
4 types of connection available
The sensors are available with different tail connections so that customers can choose according to their needs.
WQS-Cl-C-S01
IP65
5 pole aviation plug, cable length 2m with waterproof connection thread
WQS-Cl-C-S11
IP68
Cable extending directly, cable length 6m with waterproof connection thread
WQS-Cl-C-P01
IP65
5 pole aviation plug, cable length 2m
WQS-Cl-C-P11
IP68
Cable extending directly, cable length 6m
Installation methods
flow through
Install the conductivity electrode into the flow cell as shown below. Then secure the flow cell to the backing plate
Submerged
Sensors with an extended cable on the end can be directly submerged in water
| Specification | Detail |
| Principle | Free chlorine: Double platinum ring, constant voltage method |
| Parameter | Free chlorine (HClO), Temperature |
| Dimensions | φ25×231 mm (φ0.984×9.094 in) Slightly different sizes for different interfaces |
| Weight | 0.62 kg |
| Power Requirements | DC +12-+24 V |
| Installation method | Submerged, Flow-through |
| Operating temperature | 2-45 °C (35.6-113 °F) |
| Storage temperature | 2-45 °C (35.6-113 °F) |
| Sensor cable length | Cable extending directly: 6 m (19.69 ft.), 5 pole aviation plugs: 2 m (6.56 ft.) Please contact us for other sizes |
| Communication method | Modbus RS485 |
| Sampling requirements | Temperature: 2-45 °C (35.6-113 °F) Flow rate: 250-500 mL/min; Pressure: no more than 1bar, in water flow at 2-45 °C (35.6-113 °F) |
| Certification | CE |
| Warranty period | One year |
| Parameter | Range | Resolution | Accuracy |
| Free chlorine | 0-2 mg/L, 0-5 mg/L, 0-20 mg/L | 0.001 mg/L | ±3% F.S. |
| Temperature | 2-50 °C | 0.1 °C | ±1 °C |
