Do you need to assess water quality and other parameters but don’t have a cheap pH meter? Do you have trouble using it with Arduino? Here is an analog pH meter that has been exclusively created for Arduino controllers and has easy, convenient, and practical connections and features built-in. It contains a power indicator LED, a BNC connection, and a PH2.0 sensor interface. To use it, just connect the pH sensor with a BNC connection and plug the PH2.0 interface into any Arduino controller’s analog input port. The pH value will be easily obtained if pre-programmed. Comes in a small plastic box with foam inserts for easier mobile storage. In general, the interval lasts roughly a half year. If you want to measure the unclean aqueous solution, you need to increase the calibration frequency.