In the typical EG series magnetostrictive level transmitter a 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 magentostrictive 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.
High accuracy
Repeatability of 0.004% F.S.
Fast response time
304SS, 316SS and polypropylene wetted parts
4-20mA output, 2-wire loop powered
RS485 serial link available
Two-float version for insoluble liquids available
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