Chlorine Sensors & Transmitters

Chlorine Sensors & Transmitters

Chlorine sensors and transmitters provide continuous measurement of residual disinfectants used for microbial control in water systems. The category includes field sensors and associated transmitters for reliable measurement of chlorine- and bromine-based disinfectants, supporting both control and verification across disinfection processes. Because disinfection performance is sensitive to dose, contact time, and water chemistry, real-time residual measurement becomes a primary feedback signal for stable treatment.

Measurement technologies in this category include amperometric sensors and optical methods, each suited to specific disinfectant regimes and operating conditions. Sensors are paired with transmitters that apply compensation (e.g., temperature), convert signals into standard outputs, and deliver diagnostics for maintenance planning. Platforms may be implemented within digital ecosystems (e.g., Memosens and Liquiline families) and support common industrial protocols for integration into plant networks and control systems.

Continuous disinfection measurement delivers value through tighter chemical control and improved risk management. Maintaining an appropriate residual helps meet microbiological requirements while avoiding overfeed that can drive taste/odor issues, corrosion potential, and unnecessary chemical cost. Trending also supports early detection of process disturbances such as upstream demand shifts, loss of feed, poor mixing, or unexpected contaminant loading, enabling corrective action before off-spec water leaves the process boundary.

Typical applications include drinking-water disinfection, reuse-water systems, and pool-water disinfection, where stable residual control is central to safety and compliance. Additional use cases include food and beverage water management, cooling-water disinfection programs, and industrial process-water circuits where microbial growth impacts quality, fouling, or downstream membrane performance. Sensor selection is often coordinated with the disinfectant chemistry used and the required measurement point (post-contact basin, distribution, or point-of-use).

Successful deployment depends on stable hydraulics at the measurement point and disciplined verification practices. Flow assemblies or bypass loops are commonly used to maintain consistent flow and minimize bubbles and particulate effects. Calibration/verification typically aligns online readings with recognized wet-chemistry checks and documented procedures. Transmitter selection often centers on required outputs, communications, and diagnostics needed to standardize maintenance across multi-site deployments.

Field Instruments & Controls, Inc. an exclusive authorized representative of sales and service for Endress+Hauser.