Level gauges are meters used to determine the level of a liquid in a fixed storage or process tank. The gauge is composed of several parts including head, float, measuring tape, bottom anchored bracket, guide wires, elbows, anchors, coupling, pipe support brackets, and pipework. Liquid level gauge calibration is used to ensure proper readings are obtained when using level gauges.
Level gauges have several advantages including durability for harsh environments, including the ability to withstand high pressure, temperature, and vibrations. They are easy to read from a distance and can be used in addition to a switch or alarm in a system. There is little maintenance required and all repairs can be done without disturbing the system. They can also be customized for extreme applications.
There are several basic types of level gauges. Examples include:
Tank level gauges – A tank level gauge is used in tank volume monitoring.
Fuel level gauges – A fuel level gauge provides a direct fuel level reading for vehicles and equipment. The two main parts of a fuel gauge are the sender and the gauge. The sender measures the fuel level in the tank and the gauge displays the level to the user. The sending unit measures the fuel once the float has dropped below a certain level. When the tank is full, the float is near the top and the wiper rests close to the grounded side. This means that the resistance is small and a relatively large amount of current passes through the sending unit back to the fuel gauge. As the gas level drops, the float also begins to sink and the wiper moves to increase the resistance and cause the amount of current sent back to the gauge to decrease. To watch an animation of this level system, click the image below.
Water level gauges – A water level gauge is used for measuring the rise and fall of water levels.
Mechanical level gauges – A mechanical level gauge monitors levels of underground storage tanks.
This article comes from globalspec edit released