Within the ATLAS™ chamber is a float containing an internal group of magnets. A rise or fall of the fluid in the process tank corresponds to a similar change within the piping column. In response to the level movement the float moves up or down accordingly.
Clamped to the piping column in total isolation from the process liquid is a visual indictor housing. It contains the choice of indicator, either a series of flags or a follower (also known as a shuttle).
The individual flags or the follower contain an alignment magnet that couples with the float magnets as the float moves up or down within the piping column. Float movement rotates the flags and changes their color, or in the case of the follower moves the follower to the point of level.
The position of the follower, or point at which the flags change color, represents true level. Level is indicated or "read" by the corresponding point on the measuring scale.
The AURORA® magnetic level indicator combines the operating system of a conventional float-based magnetic level indicator (ATLAS™) with the leading edge Eclipse® Guided Wave Radar transmitter. Since the signal from the ECLIPSE® transmitter is carried within a waveguide, process conditions that hamper other measurement technologies have virtually no effect on the ECLIPSE® unit's accuracy and reliability.
The result is true level-measurement redundancy in a single-chamber design.