Target: Solution
Model: MW-RCl101
Detection range: 0~20 mg/L
Detection principle: It is polarographic type residual chlorine water quality detection sensor
Characteristics: High precision, low power consumption, linear output, Analog signal output
Resolution and accuracy: Minimum graduation value 0.01 mg/L
Sensitivity 8-17.5nA/mg/L(HClO
Response time: <90 s

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MW-RCl101 sensor is polarographic type residual chlorine water quality detection sensor. The remaining chlorine molecules in the solution to be measured reach the cathode surface of the electrode through the selective film of the sensor. Under the polarization of the cathode, the remaining chlorine molecules are reduced due to gets electrons and the anode are oxidized due to lose the electrons. At the same time, a current signal is generated, and the signal size is proportional to the concentration of residual chlorine. The concentration of residual chlorine can be determined by detecting the current signal magnitude in the electrode reaction process.


It is widely used in the monitoring of residual chlorine content in water works, medical wastewater treatment and swimming pools.


Low power consumption, high precision, linear output, analog signal output.


Measure range 0~20 mg/L
Temperature range 0~60℃
Minimum graduation value 0.01 mg/L
Response time (T90) <90 s
Temperature compensation without
Zero point output <0.005 uA
Calibration method Laboratory comparison method
Accuracy ±0.01 mg/L
Sensitivity 8-17.5nA/mg/L (HClO)
Interface 2 pcs of positive and negative cables

* The description and specifications might be changed without notice. Please contact us for the latest information before placing orders.

Technical Support:

Customized technical design and function, LOGO and package are available without extra charge (including molding fee) for mass volume.

The sensors don't have sleeping mode. It can be set in program if needed.

All Winsen products go through strict inspections and tests to make sure they are 100% qualified before shipping out.

The sensor has been fully tested (not calibrated) before leaving the factory. However, after transportation and storage, the environment conditions change, and the surface of the sensor absorbs moisture, mixed gas, pollution matters, etc. It is recommended that customers perform aging and calibration after sensors become stable according to the program and use occasions of the whole device.

15﹪-90﹪RH without condensation,greater or less than this range or long-term high temperature and high humidity will affect the life of the sensor.

Our sensors are certified with CE, 3C, ROHS, anti-explosion, fire prevention, and coal mining safety according to different applications. And we provide assistance for new certification.

Many factors can cause the sensor to fail such as broken wires in transportation, poisoning, falling off of the sensitive material, damage to the heating wire (device), etc. Please find specific cause in each category with Winsen’s aftersales.

Winsen provides professional consultation and service before and after sales. We will recommend the best fitting sensor for your demand. If you have any problem, don’t hesitate to email us to

Due to high volume of daily incoming emails and time zone difference, we may not be able to reply your emails immediately. But we will reply to your inquiry in 24 business hours.