There is an undeniable need to keep the liquids being used in the factories under control and in knowledge of the staff by the liquid level indicator installed with the storage tanks. Since the liquids are used for different purposes in the factories, shortage of these can be disastrous and can cause great loss to the factory. However, there is not some fixed type of a liquid level indicator which is being used everywhere, in fact there are various types these devices and they are being used all over the globe according to their compatibility with the liquids. Here is a list of some of the most popular types of liquid indicators being used in the different places around the globe.

Float Switch
This simple but very useful liquid level sensor has even become a household item. The working system of this is very simple as the switch is attached to the lid of the water tank and with the help of a string the float is immersed in the tank. As the water level rises and falls in the tank, the switch is defined with a starting point and when the water level reaches the point, the switch turn on the water pump automatically. When the pump is turned on it starts filling the tank with water and as it reaches to the brim the switch turns off automatically. Hence this simple but useful device can be installed in homes and even factories but it is only used with water.

Suspended Chain
This is one of the oldest and banned method of measuring liquid levels in a container but it is worth mentioning here because in most under developed countries it is still being used illegally. A chain double the size of the liquid’s tank is suspended over the liquid tank. The chain is lowered into the tank and as it hits the bottom, it is pulled out. The length of the chain that gets wet from the liquid is considered to be the liquid level inside the tank.

Ultrasonic Level Indicator
The ultrasonic level indicator is the most modern device being used these days. Emitting a series of ultrasonic waves, this device can measure every kind of liquid inside a tank. As the waves travel the length of the liquid tank, the moment they touch the liquid’s surface they bounce back to the transducer which calculates the time and distance travelled by the waves to identify the liquid level inside the tank.