Level sensors are used to detect the level of solid or liquid, or to detect the interface between the solid and liquids. Level gauge is a type of level sensor mostly used devices in the industrial instrumentation area. As the name suggests, level gauges are used to measure the level of liquid inside a storage tank or process tank. The use of level gauges is predominant in locations where it is necessary to measure the level of fluid or liquid.

There are various types of level gauges as follows to measure the level of various forms of liquids including light fuels, diesel, oil, and water. These include magnetic level gauge, which are used to measure and control the level of fluids, tank level gauges, which are used to measure the tank volume, fuel level gauges that are used in vehicle and equipment to measure the fuel level reading, water level gauges used to measure the increase/decrease in water level, and mechanical level gauges, which are used mostly in underground storage tanks to monitor the level of fluid.

The level management gauges are suitable for industrial, rural, domestic and environmental protection applications, and mainly in industries, such as chemical and petrochemical refineries, water treatment, waste treatment, pulp and paper processing, power plants, pharmaceutical processing, food and beverage processing, and oil production plants. They are also used in tanks such as boiler feed water tanks, ammonia tanks, scrubber tanks, storage tanks, and acid tanks. In the above industries, level gauges are used in some form or another to measure the level of the fuels and solvents, oil production and refining, lubrication oils, detergents and soaps, boiler feedwater tanks, fertilizers and pesticides, ammonia tanks.

The level gauges that are used in boilers have bi-color gauges and magnetic gauges. Illuminators are provided with most of the level gauges, except magnetic gauges. The illuminators enable easier viewing of the water level even from long distances either using the naked eye or through a closed circuit television (CCTV) camera. These types of illuminators are of great use in boilers that are very lengthy and run across several floors.

Some types of magnetic level gauges do not require the need of glass. These types of level gauges are used in high pressure applications and hazardous locations.

Level gauges come in many different forms, and is formed of glass tube, clear plate glass, or reflex plate glass. Level gauges made of glass tube are specifically used for low pressure boilers, and level gauges made of plate glass are used primarily on high pressure boilers.

The standard level gauges usually are composed of components, including head, float, measuring tape, bottom anchored bracket, guide wires, elbows, anchors, coupling, pipe support brackets, and pipework.

There are many suppliers and manufacturers who provide quality level gauges. It is to be noted that the level gauges are manufactured according to the National Association of Testing Authorities-Australia (NATA)'s standards. For more information, click here