Online Free Chlorine Analyzer

CL300-C1

The T-FCL-20 Online Free Chlorine Analyzer is a smart industrial instrument designed for continuous monitoring of residual chlorine and temperature in water systems. With features like real-time data logging, RS485 communication, relay alarms, and waterproof industrial design, the analyzer ensures accurate and reliable measurement for disinfection control and water quality management. It is widely used in drinking water, wastewater, and industrial water treatment applications.

Accurate monitoring of residual chlorine for safe disinfection
Real-time data logging and trend analysis
Reliable operation in harsh industrial environments
Supports automation with communication and relay outputs
Improves water quality compliance and process control

Application-Based Customization

Engineered for Your Process Conditions

Expert Selection Support

Reliable After-Sales Service

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Large display, standard 485 communication, with online and offline alarm, 98*98*130mm meter size, 92.5*92.5mm hole size, 3.0 inch large screen display.
Historical curve: The residual chlorine measurement data can be stored automatically every 5 minutes, and the residual chlorine value can be stored continuously for a month. Provide standard solution calibration and field calibration.
Built-in various measurement functions, one machine with multiple functions, meeting the requirements of various measurement standards.
The design of the whole machine is waterproof and dustproof, and the back cover of the connection terminal is added to extend the service life in harsh environments.
Panel/wall/pipe installation, three options are available to meet various industrial site installation requirements.

Drinking water treatment plants
Wastewater treatment systems
Industrial water purification
Power plants and cooling water systems
Pharmaceutical and food industries
Swimming pool and disinfection monitoring

Measuring Range: 0.00–20.00 mg/L ; 0.00–20.00 ppm (User configurable)
Measurement Principle: Potentiometric method
Resolution: 0.001 mg/L ; 0.001 ppm
Accuracy: ±1% F.S (transmitter), ±0.05 mg/L (sensor)
Temperature Range: -10 to 150 °C (based on sensor)
Temperature Resolution: 0.1 °C
Temperature Accuracy: ±0.3 °C
Temperature Compensation: NTC10K
Analog Output: 2 × 4–20 mA isolated output (load <750 Ω)
Communication: RS485 Modbus RTU
Relay Output: 2 groups, 5A 250VAC / 5A 30VDC
Alarm: High and low alarm (AC220V or 24VDC)
Data Function: Data record and curve display
Waterproof Rating: IP65 (transmitter), IP68 (sensor)
Working Temperature: -10 to 60 °C
Relative Humidity: <90%
Power Supply: 85–265 VAC or 9–36 VDC, power consumption ≤3 W
Installation: Panel, wall or pipeline mounting
Sensor Material: PP, Glass
Sensor Structure: Double liquid junction, annular liquid junction
Pressure Resistance: <3 bar
Sensor Temperature Range: 0–60 °C
Calibration: Sample calibration
Cable: 4 core cable, standard 5 m (extendable up to 100 m)
Installation Thread: PG13.5

Comprehensive Services Using This Product

From installation to ongoing support, we’re with you every step of the way.

Thermography

Infrared imaging for proactive maintenance and safety.

Calibration

Precise calibration ensuring measurement accuracy and compliance.

Industries Using This Product

Our solutions are trusted by top industries to drive growth and improve operations.

Water

Water

Reliable solutions for water treatment and quality monitoring in industrial applications.

Food & Beverage

Food & Beverage

Food & Beverage

Improving production and safety in food and beverage industries with real-time monitoring.

Chemicals & Fertilisers

Chemicals & Fertilisers

Chemicals & Fertilisers

Precision solutions for chemical processes, ensuring compliance and operational efficiency.

Power

Power

Optimizing power plant operations with real-time monitoring and predictive maintenance solutions.

What Customers Say About Us

Trusted Engineering Support

The team provided clear technical guidance and practical solutions. Execution was smooth and well coordinated throughout.

Mr. Vivek NairGeneral Manager – Operations, Cement Industry

Dependable Technical Partner

Their approach was systematic and aligned with our plant needs. Overall experience with product and service has been positive.

Ms. Kavita RaoSenior Manager – Maintenance, Steel Sector

Application-Focused Solutions

They understood our process conditions before recommending equipment. Support during installation was handled professionally.

Mr. Rohan MehtaProject Lead – Power Plant

Consistent Service Delivery

Product performance has been stable in regular operations. The support team responds in a timely manner.

Mr. Anil DeshmukhInstrumentation Head, Process Manufacturing

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Frequently Asked Questions About This Product

It is used for continuous monitoring of residual chlorine in water treatment and disinfection processes.

Residual chlorine ensures effective disinfection and prevents microbial contamination, making it critical for drinking water safety.

Yes. It supports: 4–20 mA output, RS485 Modbus communication, and Relay alarms

Yes. The analyzer stores data every 5 minutes for up to one month, along with trend curve display.

Industries include: Water & wastewater, Power plants, Food & beverage, Pharmaceuticals, and Swimming pools & utilities

Download Resources

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