FineTek EG series magnetostrictive level transmitter is using buoyancy, magnetostriction, the state-of-the-art electronics technologies accurately measure the level of a wide variety of liquids. In the typical EG series magnetostrictive level transmitter float, appropriately sized for the specific fluid density, is mounted on the level transmitter stem such that the float will travel up and down due to the buoyancy of the float from the fluid being measured. The float contains a magnetic element. To locate the float position the magnetostrictive level transmitter electronics sends a short current pulse down a sensor wire located within the level transmitter stem with a specific frequency, setting up a magnetic field along its entire length. This field interacts immediately with the field generated by the magnet contained within the float. The overall effect is that during the brief time that the current flows, a torsional force is produced in the wire, much like a sonic vibration or wave, and travels back to the magnetostrictive level transmitter electronics. A timing circuit exists within the electronics which measures the time-of-flight (TOF) between the start of the current pulse and the return signal. In this manner, the float’s location (and therefore the fluid level) is very precisely determined and presented as a level signal by the magnetostrictive level transmitter, typically 4-20mA.
Applications
USE
- Level control for fast-changing fluid levels
- Level measurement of liquids in tanks and other vessels
- OIl/water interface and dual fluid measurement (2 float version)
INDUSTRY
- Petroleum, LNG
- Chemical processing
- Food and beverage
- Pharmaceutical
- Power utilities
- Many others
