Onine pH/ORP meter is a microprocessor-based water quality online monitoring contro instrument. The instrument equipped with different types of pH or ORP electrode. It is widely used in power plants, petrochemical industry, metallurgical electronics, mining industry, paper industry biological fermentation engineering, medicine, food and beverage, water treatment, aquaculture, modern agricultural planting and otherindustries. Continuously monitor and control pH value. ORP value and tenperature of acueous solution.