A Top Mounted Magnetic Level Indicator (Direct Indication) is a type of liquid level gauge that is mounted on the top of a storage tank or vessel to directly display the level of the liquid inside. It works by using a float inside the tank that moves up and down with the level of the liquid and a magnetic board outside the tank that indicates the position of the float. The float and magnetic board are connected by a rod or cable, and the float's position is indicated directly on the magnetic board. This type of level indicator does not require any electrical power to operate and is commonly used in various industries, such as chemical, petroleum, and water treatment, to monitor liquid levels in storage tanks and vessels. It is a simple, cost-effective, and reliable solution for measuring liquid levels.