liquid or water level indicator with TFT display using Arduino

here is the video of industry grade liquid (or water) level monitoring system with TFT LCD. it is having 4.3" TFT LCD with multicolor graphics and display animation. it uses Arduino nano development board and UDM sensor HC SR04 for measuring liquid level in tank. it displays actual capacity and liquid level in liter. it has animated display of filling water in tank

[@Mukesh-vo2yr]

This code ?

[@sivu2048]

what will happen to the sensor on overflow!?
Great project!

[@ecengambhatt]

Sensor is mounted above overflow level. Also this is not liquid level controller. It is only monitor