Application: Wastewater Treatment Plant Effluent
A closed-cell potentiostatic probe for free chlorine is an electrochemical sensor specifically designed for continuous monitoring of residual free chlorine (Cl₂/HOCl) in treated wastewater discharged from a treatment plant. This type of sensor is typically connected to a dual-channel controller (pH / chlorine), which allows real-time correlation between chlorine concentration and pH, ensuring safe and compliant disinfection control.
Operating Principle
The probe works according to the potentiostatic amperometric method:
Inside the probe, a working electrode and a counter electrode are separated from the sample by a selective membrane.
A constant polarization voltage is applied between the electrodes.
Free chlorine diffuses through the membrane and is reduced at the electrode surface.
This electrochemical reaction generates a current directly proportional to the free chlorine concentration.
The controller converts this current into a chlorine value (ppm or mg/L).
The closed-cell design includes an internal electrolyte chamber and membrane, isolating the electrodes from the wastewater and providing stable, repeatable measurements even in dirty or variable process conditions.
Installation in a Wastewater Discharge Line
The probe is installed in a flow cell on a bypass line downstream of the disinfection stage (chlorination). A constant and bubble-free sample flow is required to ensure accurate readings.
The dual pH / chlorine controller continuously:
Compensates the chlorine reading based on pH
Displays both values
Controls chemical dosing pumps
Generates alarms when discharge limits are exceeded
More info: e-mail
Nessun commento:
Posta un commento