Chlorine Sensor (Free & Total Chlorine)

Measuring disinfectant levels to ensure safety, hygiene, and regulatory compliance.

What Does a Chlorine Sensor Measure?

A chlorine sensor measures the concentration of chlorine present in water or process fluids, typically expressed in mg/L or ppm. Measurements may represent free chlorine, combined chlorine, or total chlorine depending on the application. Chlorine monitoring is critical for disinfection effectiveness and prevention of over-dosing.

Working Principle

Chlorine sensors operate by detecting chlorine through electrochemical or optical reactions. The sensing element selectively responds to chlorine species, producing a signal proportional to concentration.

Common Types of Chlorine Sensors

Signals & Outputs

Direct & Indirect Meaning of Chlorine Data

Direct Meaning

The measured value directly represents the concentration of chlorine in a liquid.

Indirect Meaning

Chlorine trends indirectly indicate disinfection effectiveness, pathogen control reliability, chemical dosing efficiency, and risks of corrosion or harmful by-product formation.

Industries Using Chlorine Sensors

Role of IoT in Chlorine Monitoring

With Industrial IoT integration, chlorine sensors enable continuous disinfection monitoring, automated dosing control, real-time safety alerts, and compliance-ready water quality reporting.

IndustrioPedia Perspective

The Chlorine Sensor is the final gatekeeper of public health. By ensuring effective yet controlled disinfection, it protects consumers, safeguards infrastructure, and upholds trust in water and process systems.