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Description:This is Liquid pH Value Detection Sensor for Arduino.The pH stands for the power of hydrogen, which is a measurement of the hydrogen ion concentration in the body. This is used in Water quality testing and Aquaculture. The total pH scale ranges from 1 to 14, with 7 considered to be neutral. A pH less than 7 is said to be acidic and solutions with a pH greater than 7 are basic or alkaline.The PH electrode has a single cylinder that allows direct connection to the input terminal of a pH meter, controller, or any pH device which has a BNC input terminal. The pH electrode probe is accurate and reliable that can give almost instantaneous readings.________________________________________Package Includes :1 x Liquid pH Value Detection Sensor For Arduino1 x set of Mounting Accessoriesinout• TO – Temperature output• DO – 3.3V pH limit trigger• PO – PH analog output• Gnd – Gnd for PH probe• Gnd – Gnd for board• VCC – 5V DC• POT 1 – Analog reading offset (Nearest to BNC connector)• POT 2 – PH limit setting