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TW-4749A Free Chlorine Sensor

What's In The Box

  • TW-4749A Free Chlorine Sensor

  • 10m Cable (default), Customisable

  • User Manual

  • Delivery Inspection Report

Applications

Drinking Water Treatment Plant: 
Continuously monitor the residual chlorine content in treated water and throughout the distribution network to ensure water quality safety.  

Swimming Pools: 
Precisely control the residual chlorine concentration in pool water to maintain optimal water quality and hygiene standards.  

Food Processing Industry: 
Rigorously monitor the residual chlorine levels in process water and cleaning water to safeguard food safety and compliance with health regulations.  

Industrial Water: 
Regularly measure the residual chlorine content in cooling water and boiler feedwater to ensure efficient operation and prevent system corrosion. 

Water Quality Sensors

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TW-4749A Free Chlorine Sensor

Model number：TW-4749A
Power：0.5W
Dimension：Φ13mm*120mm
Customise：OEM, ODM

Product description:
TracWater TW-4749A Free Chlorine Sensor adopts a negative pulse of specific voltage amplitude applied between the polarised electrode and the reference electrode to selectively select free chlorine to participate in the reaction, so that it can undergo an electrochemical reaction at the cathode of the electrode, thus forming a current signal proportional to the concentration of free chlorine.

Overview

TracWater’s TW-4749A Free Chlorine Sensor employs a specific negative pulse voltage applied between the polarised and reference electrodes to selectively target free chlorine for reaction. This enables an electrochemical reaction at the electrode's cathode, generating a current signal that is directly proportional to the concentration of free chlorine. By collecting and analysing this current signal, the sensor accurately determines free chlorine levels. It offers strong selectivity, minimal maintenance requirements, a long electrode lifespan, and ensures high reliability without the need for part replacements.

Features

  • RS-485 transmission interface with MODBUS-RTU communication protocol, supporting dual-channel communication.

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  • Power supply and output isolation design to ensure electrical safety.

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  • Built-in protection circuit to enhance anti-interference capability and adapt to complex environments.

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  • Communication protocol is simple and user-friendly, providing additional electrode diagnostic information for enhanced intelligence.

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  • Includes built-in calibration parameters for simplified on-site use and secondary calibration processes.

Specifications

Name

Residual Chlorine Sensor

Model

TW-4749A

Measuring principle

Constant Voltage Method

Range

0-20mg/L

Accuracy

±0.02mg/L

Resolution

0.01mg/L

Temperature

0-50℃

IP range

IP68

Sensor interface

RS-485, MODBUS protocol

Size

Φ13mm*120mm, (no cable)

Power

about 0.5W

Power supply

DC 9-27V, >1A

Flow rate

20-40L/h

Isolation strength

2500Vrms

Sensor housing material

ABS+316L

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