The ORP (oxidation reduction potential) is a REDOX potential that measures the macroscopic oxidation-reduction characteristics of all compounds in aqueous solution. The ORP value, which indicates the balance of oxidant and reducing agents in solution, is an important measure for water quality monitoring and control.

ORP Meter Working Principle：

ORP sensors measure the electrochemical potential in a solution through contact between the electrode and the solution. The sensor usually consists of two electrodes: one is a measuring electrode (usually platinum or gold) and the other is a reference electrode (usually silver/silver chloride). The measuring electrode detects electron transfer in solution, and the reference electrode provides a stable reference potential. The potential difference of the sensor output is the ORP value.

Positive ORP value: indicates that the solution has a strong oxidation capacity and contains more oxidants. Negative ORP value: indicates that the solution has a strong reducing capacity and contains more reducing agents.

Factors influencing ORP measurements：

Solution composition: The kind and concentration of oxidants and reducing agents in the solution have a direct effect on ORP.

Temperature: Temperature changes will affect the potential response of the electrode, and temperature compensation is required.

pH: Changes in pH also affect ORP measurements and require pH compensation.

ORP sensor application:

Water treatment: In drinking water and wastewater treatment, ORP sensors are used to monitor and control the concentration of disinfectants, such as chlorine, to ensure safe water quality.

Swimming pools and spas: ORP sensors are used to monitor and control disinfectant levels in swimming pools and spas to prevent bacterial growth.

Food and beverage industry: in food processing and beverage production, ORP sensors are used to monitor fermentation processes and product storage environments to ensure product quality.

Environmental monitoring: ORP sensors are used to monitor the REDOX status of natural water bodies and assess pollution levels and ecological health.