There are two broad categories of liquid level sensors. Level radar sensor that has been set to detect when a liquid reaches a certain level These are commonly used to produce an emergency situation if fluid levels become significant. The level might be too high, which might indicate the risk of a spillage or pressure build-up, or it might be too low, which might be a result of leakage. Continuous level sensors like VEGAPULS 64 are advantageous for processes that involve variable levels of liquid, such as batch manufacturing. They also assist with accurate volume measurement. There are a number of things to keep in mind when picking a suitable method for tracking the levels of liquids beyond whether point or continuous level detection is necessary. Additional factors that influence a liquid's behavior include the chemical composition, density, viscosity, and other qualities of the liquid measured, as well as its propensity to foam, the characteristics of vapors created by the liquid, if any, and the surrounding atmosphere or environment.

What is Magnetostrictive Level Transmitter 

As previously noted, magnetostrictive transmitters are exceedingly accurate. It is possible to achieve a measurement error of less than 0.04 inches when reporting levels of a liquid (1.00 mm). In addition to this accuracy, the design, components, and mechanics of this technology contribute to decrease installation and maintenance costs, making it quick and simple to install, easy to maintain, and resulting in shorter downtimes and longer lifespans. Magnetostrictive level sensors are advantageous due to their features, such as wide-ranging abilities that cannot be matched by rival technologies, such as radar transmitters, ultrasonic sensors, and submersible pressure transducers.

Like magnetostrictive probes both radar and ultrasonic sensors are time of flight instruments that determine levels based on the time lapse between the initial transmission and the reflected return signal. Radar level transmitters employ electromagnetic radiation to measure the levels of liquid. These liquid electrodes create low-energy, high-frequency impulses that reflect off the surface of the liquid being measured. One method of improving the radar accuracy that includes True Echo™ technology is magnetostrictive transmitters. These systems do not rely on electromagnetic waves and should therefore be unaffected by any air pollutants, such foam or mist. Electromagnetic waves are transmitted via a variety of surfaces at the speed of light; as such, the sensors' sensors are accurate if they are reflecting off of the correct surface. Ultrasonic level sensors use sound waves that are undetectable to humans to monitor the liquid level. While magnetic sensors and radar sensors both suffer from excessive vapor buildup, which may lead to misleading readings, ultrasonic sensors don't, as the sensors can be contaminated by foam, thick dust, or aerosols that can generate a false surface.

While ultrasonic sensors are contact level sensors that rely on the soundwaves emitted from the probe to the surface and the beams of electromagnetic waves to return to the sensor, radar sensors are non-contact sensors that utilize the electromagnetic waves emitted from the probe to the surface and the soundwaves to return to the sensor. The beam angle complexity mentioned above means these sensors can meet beam angle issues. Because level transmitters are contact level sensors, they spare the user from dealing with beam angle difficulties that are prevalent when utilizing non-contact level sensors such as radar and ultrasonic sensors.

In contrast to transducers that make direct contact with a liquid, pressure transducers use a simple pressure application technique to find the levels of liquids. Once the applied pressure is known, and the density of the liquid above is known, the level of the liquid in question can be estimated. Any chemical difference results in erroneous measurements, as it is vital that the liquids have the same density to operate well. The reason that magnetostrictive level transmitters are preferable to submersible pressure transducers is because they only require the stem of the instrument to be submersed in the liquid being measured, rather than the full instrument plus wires. As the cable is not in contact with the liquid to be measured, the magnetostrictive probe can be utilized in tougher settings and is more chemically compatible than the submersible pressure transducer.

Magnetostrictive level transmitters are great for measuring interface level as well. There are various industrial and commercial operations that contain liquids that are made up of two layers of varied density due to the varying levels of liquids. If you use immiscible liquids like water and oil, such as a water solution and an organic chemical, it is possible to use a single magnetostrictive level sensor to differentiate the different levels of each liquid. One float can be attached to a single stem, whereas more than one float can be linked to a single stem. It is possible to weigh the bottom float with absolute precision such that it sinks in the lighter fluid but stays afloat on the denser bottom layer.