How Halogen combines reagentless amperometric chlorine sensing, mechanical cleaning and water-chemistry compensation. Explore the benefits and limits.
In amperometric chlorine measurement, an electrochemical reaction at the sensing electrodes produces a current related to the chlorine concentration. Halogen uses pulsed operating potentials as part of its measurement and surface-renewal approach. This is reagentless sensing: there is no continuous analytical reagent supply. The selected model determines the disinfectant measurements available.
Integral circulation and captive cleaning media help remove deposits from the sensing surfaces. Together with electrochemical renewal, this addresses a common source of unreliable readings: a changing sensor surface.
The response to chlorine changes with water chemistry. Integrated pH and conductivity measurements support compensation, while site reference checks remain part of commissioning and operation.
Local circulation supports applications with variable or zero external flow within the selected model’s rated envelope. Pressure, temperature, chemistry and installation requirements still apply.
Removing analytical reagents, membranes and electrolyte can simplify routine work. Cleaning media, wear parts, seals and pH components still need the appropriate checks and service.
Look beyond reagent cost alone. Compare the sample-water path, cleaning and verification work, replacement parts, service access and integration into plant systems. The potential to reduce routine interventions is application-specific; it should be assessed against the site’s existing monitoring arrangements.
These are the photographs used in PMA’s published MP5 field-trial account. They show deposits on the outer cap, inside the flow cell and at the sensing end.
It measures chlorine without continuously dosing analytical reagents into the sample. Halogen uses electrochemical sensing with mechanical cleaning and water-chemistry compensation.
Integral circulation helps control local conditions at the sensing surface when external water flow changes. It remains subject to the selected sensor’s rated chemistry, temperature, pressure and installation limits.
It can help reduce work associated with deposits at the sensing surface in a suitable application. Verification, wear parts and other scheduled service tasks remain. A site evaluation is the right basis for comparing the workload.
Read alongside the current documentation for your exact sensor and installation.
Current manufacturer free-chlorine product information. Compare its generation and operating limits with the MP5A guide used on PMA’s MP5 page.
Read referenceRead about the motor-driven impeller, cleaning beads and sensor-surface renewal behind Halogen’s self-cleaning approach.
Read referenceCompare Halogen chlorine sensors for free chlorine and monochloramine monitoring. Review self-cleaning technology, installation and UK support from PMA.
Explore this topicLearn which maintenance and verification tasks remain with a self-cleaning chlorine sensor, and what to ask about cleaning, wear parts and calibration.
Read articleReview self-cleaning chlorine monitoring where iron and manganese deposits increase sensor maintenance. Discuss borehole water and site evaluation with PMA.
Explore this topicStart with your water chemistry. Choose the installation and connections, then see how your sensor and controller work together.
Tell us about your disinfectant, water chemistry and installation. PMA can help you work through the sensor, controller and integration requirements.
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