We know that liquid level sensors are used for monitoring free-flowing substances to regulate the process in a particular way. Usually, these substances are liquid. However, some solids like powdered substances can be measured by them. Most of the liquid level sensors are used industrially. These have been in markets for decades. Food and beverage, agriculture, printing, medical and domestic, and automotive industries use these type of sensors for level measurement or leak detection.
For instance, liquid level sensors are used in cars to monitor liquids including oil, fuel or power steering fluid. You can also found them in household machines such as a coffee machine.
They are used to identify a liquid rise and fall point, total amount of liquid in a container, and continuous measurement of volume. The primary purpose of using these sensors is to monitor and regulate the liquid level within a contained space such as huge tanks and vessels.
Types of Liquid Level Sensors
You will find different types of level sensor in the market. All of these are made for the same purpose: detecting the point level of liquid substances. However, different models use the various machines to measure the point level.
- Some of these types follow the magnetic float techniques, where the magnet rises and falls following the liquid. When the fluid as well as the magnet, reach into a certain level, the sensor will be activated. Usually, there is a reed magnetic switch in the container. The switch alerts when the liquid reaches the minimum or maximum level. Also, many of these sensors have a protective shield that can protect the magnet from the interference of liquid substances.
- A conductive sensor is another common. Usually, these types of sensors use a source power of reasonably low voltage. You will find at least two electrodes into the container. The sensor activated an alarm switch when the liquid reached the marked point.
- Some of these are called Pneumatic sensor. Usually, these are used to measure hazardous liquids. If in any system where the sensor cannot contact with the fluid, the Pneumatic sensor work there. Because, it detects the air level between the sensor and the liquid, then calculate the amount about how much fluid can fill the whole container.
- Also, there are some other types of sensors that can measure a continuous flow of liquids. Like the magnetic float sensors, there are also Magnetostrictive sensors that use magnetostrictive wire to alert when the magnetic field is disturbed by the magnet. The disturbance point is measured to calculate the distance between the end of disturbance and the bottom of the wire. Usually, this type of sensors is integrated through computer programs for better accuracy.
Where are these level sensors used?
Liquid level sensors are used mainly in industries. To ensure that the processes of these industries are running well
â Food and beverage companies use them to ensure products standard. Those companies who want to maintain their reputation use them to maintain consistency of the taste and quality of their products. These are used for detecting the condition of chocolate, wine, beer, milk and other relevant substances.
â These sensors are also used in massive water reservoirs. These are used to monitors and regulate the water level. Especially, electricity generation processes use these sensors.
â Petrochemical plants use them to detect acidic and highly corrosive substances. You will know whether all processes are going accordingly, or not. Most of the Petrochemical plants use the ultrasonic level sensor to ensure safety at the time of identifying the quality of the substances.