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Magnetostrictive Level Transmitters

Magnetostrictive level transmitters are devices used in various industries to accurately measure the level of different liquids, including interface and insoluble multiple liquids. It uses buoyancy, magnetostriction, and advanced electronic technologies to measure fluid levels. In the typical design, a float with a magnetic element travels up and down a level transmitter stem due to buoyancy from the fluid being measured. The magnetostrictive level transmitter electronics sends a short current pulse down a sensor wire located within the stem, which interacts with the field generated by the magnet in the float. A torsional force is produced in the wire, and the time-of-flight (TOF) between the start of the current pulse and the return signal is measured to determine the float’s location and fluid level, which is then presented as a level signal by the magnetostrictive level transmitter. The device offers high accuracy, repeatability of 0.004% F.S., fast response time, and has wetted parts made of 304SS, 316SS, or polypropylene. It features 4-20mA output and 2-wire loop power, with RS485 serial link also available. The two-float version is also available for insoluble liquids. It finds use in level control for fast changing fluid levels, level measurement of liquids in tanks and other vessels, and oil/water interface and dual fluid measurement. Its application areas include petroleum, LNG, chemical processing, food and beverage, pharmaceutical, power utilities, and many others.

Application features:

  • High accuracy level measurement
  • Repeatability of 0.004% F.S.
  • Fast response time
  • Suitable for measuring a wide variety of liquids, including interface and insoluble multiple liquids with a two-float design
  • Compatible with 304SS, 316SS and polypropylene wetted parts
  • 4-20mA output, 2-wire loop powered
  • RS485 serial link available
  • Two-float version available for measuring oil/water interface and dual fluid levels
  • Commonly used in industries such as petroleum, LNG, chemical processing, food and beverage, pharmaceuticals, power utilities, and more
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Karma Instrumentation & Control is a specialist supplier of process control and automation equipment and SI systems, as well as a manufacturer and designer of process and electrical control panels.

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