Rainwater tank gauges are devices used to monitor the water level inside a rainwater tank, ensuring efficient water usage and management. These gauges provide real-time readings, helping homeowners, farmers, and businesses track their water supply without needing to open the tank manually. There are various types of rainwater tank level indicators , including mechanical float gauges, digital sensors, and wireless smart gauges . Some models offer remote monitoring via smartphone apps, making it easier to manage water levels accurately.