Gravity: Analogue Water Pressure Sensor - 

SEN0257 is an analogue gravity water pressure sensor. This is a water pressure sensor adopts DFRobot gravity 3-pin interface. It supports standard 5V voltage input and 0.5~4.5V linear voltage output. It is compatible with multiple Arduino controllers. Coordinate with a DFRobot gravity IO expansion shield, the water pressure sensor can be plugged into an Arduino board, wiring-free. Put it with solenoid valve, water turbine generator and other sensors, user can build a smart water control system. Briefly speaking, this water pressure sensor is a stethoscope to a water pipe. It will help user to diagnose whether there is water, and how strong the water pressure is. It can be widely applied to smart home control systems (SCS), Internet of Things (IoT), and device detections.