Introduction
A level meter is a device that measures the level of fluids or other substances in tanks, vessels, or pipes. It is used in a variety of industries, such as chemical, oil and gas, food and beverage, and pharmaceuticals. In this article, we will explore what a level meter is called and the different types of level meters available in the market.
What is a level meter called?
A level meter is also known as a level sensor or a level transducer. The term "level" refers to the height of a fluid or substance in a tank or vessel. A level meter measures this height and provides an output signal that is proportional to the level. The output signal can be in the form of an electrical signal, a visual indication, or an audible alarm.
Types of Level Meters
There are several types of level meters available in the market. The most common types are:
1. Float and Tape Level Meter:
This type of level meter consists of a float that floats on the liquid surface and a tape that is attached to the float. As the level of the liquid changes, the float moves up or down, causing the tape to move in or out of the tank. The tape is marked with level indicators, which can be read to determine the level of the liquid.
2. Capacitance Level Meter:
This type of level meter works on the principle of capacitance. It consists of a probe that is inserted into the tank and a reference probe that is positioned outside the tank. When a liquid is present between the two probes, it forms a capacitor. The capacitance of the capacitor changes as the level of the liquid changes. This change in capacitance is sensed by the level meter and converted into a level signal.
3. Ultrasonic Level Meter:
This type of level meter works on the principle of ultrasonic waves. It consists of a transducer that sends out ultrasonic waves and a receiver that receives the waves. The time taken for the waves to travel from the transducer to the liquid surface and back to the receiver is measured. This time is used to calculate the level of the liquid.
4. Radar Level Meter:
This type of level meter works on the principle of radar. It consists of a transmitter that sends out a radar signal and a receiver that receives the signal. The signal reflects off the liquid surface and returns to the receiver. The time taken for the signal to travel to and from the liquid surface is measured. This time is used to calculate the level of the liquid.
5. Magnetic Level Meter:
This type of level meter works on the principle of magnetic coupling. It consists of a float that moves up and down with the level of the liquid and a guide tube that surrounds the float. The guide tube has a magnetic field around it. As the float moves up or down, the magnetic field is distorted, and this distortion is sensed by the level meter and converted into a level signal.
Conclusion
In conclusion, a level meter is an essential device for measuring the level of fluids or other substances in tanks, vessels, or pipes. It is used in a variety of industries, and there are several types of level meters available in the market. The most common types are float and tape, capacitance, ultrasonic, radar, and magnetic level meters. Each type has its advantages and disadvantages, and the choice of level meter depends on the specific application requirements.