In manufacturing units, a lot depends on the stock they possess. In fact, the production is based entirely on the stock of materials that are present in the stores. It is the routine of the store manager to share the quantity of stock available with the production managers. The daily production target is decided keeping the stock in view. If there is anything that is going below the requirement, the production managers inform the store manager about it. The store manager then sends a request to purchase to the procurement department head who then asks for its timely delivery by the suppliers. This chain of information allows the production unit to operate successfully on a daily basis.

Solid materials are easy to stack and store. If the materials are too large in quantity they can be put in racks or the cartons can be stacked one on top of another. This creates enough space for larger quantities to be accommodated in a small space. But when the matter comes to handle liquids, it cannot be stacked like the solid materials. A special container is needed to keep the liquids in. Different types of liquids cannot be kept in a single container as they will mix together destroying each other. So as the variety of liquids increases, the number of tanks and containers also increase. The human eye cannot see inside the tank unless it is made of glass. So to learn about the level of liquids inside the tank a liquid level indicator is attached to it.

Liquids that are sensitive in nature or are of the nature to produce toxic fumes, they are stored inside single skinned containers. This ensures that the environment remains safe and the liquid has no chances of leaking. The container has not opening on any side of the body except for the two pipes one on top and the other on the bottom. The pipe on top is used for the inlet when filling the container with the liquid. The one on the bottom is the one that lets the liquid out.

With the help of the ultrasonic level indicator the staff measures the liquid inside the container. Regular measurement and keeping records of it helps the staff know about the availability of the liquids. The daily report of the consumption and remaining liquid helps in deciding the production targets and then forwarding those targets to the concerned production departments.