Make a Rain Alert System with Raspberry Pi – RasPi.TV
Water level Management using Raspberry Pi | Top Raspberry Project
Amazon.com: CQRobot Ocean: Contact Water/Liquid Level Sensor Compatible with Raspberry Pi/Arduino. for Automatic Irrigation Systems, Aquariums, Plants, in The Garden, in Agriculture etc. : Industrial & Scientific
Design a water level detector through a raspberry pi board and water level sensor – kookye.com