Liquid management is becoming a huge department in many factories, oil rigs, power generation plants, construction sites and commercial and residential buildings. As the human population multiplies each year; the demand for raw materials, finished products and natural resources increases rapidly all over the globe. Facilitating the population with the demands that emerge each year, the factories are now expanding rapidly and the digging up of minerals is also increasing.

Water is one of the most precious natural resource and it is being used the most all over the world in various uses. The commercial and residential complexes are known to be the biggest users of water after the factories. Keeping an unfailed massive supply of the liquids is truly one of the toughest tasks and to manage the supply huge sized water tanks are being installed. The only way to monitor the level of water inside these huge tanks is through the liquid level indicator which is either installed right beside the water tank, or inside the maintenance department’s office or in both the places.

Today it is emphasized to have the indicator present in both the places for a better way to verify the measurement. The readings are compared on both the indicators to ensure that they are both working accurately. There are a variety of indicators being used in the many different areas today. Based upon the amount of water to be stored in the tank, the indicator is installed accordingly. The most commonly used indicator is the float suspended on the surface of water and attached by a chain.

When the water level inside the tank increases or decreases, the float that stays on the surface also rises and falls accordingly. This causes the needle on the gauge outside to change its position letting the people know about the water level inside the tank. In some cases the gauge is often known to show wrong readings. This happens when the liquid indicator has been installed for a long time. The chain catches rust and the mechanism often turns faulty. In such a situation the best method is to verify which indicator is showing the wrong reading. This is verified by the ultrasonic level indicator which is now kept as a backup or sometimes a primary source of measuring also. This device can now be found in almost every factory, commercial complexes and most residential areas too.