Widely applicable level switch anti-flow of various liquid tank. HD-900 is des
igned for liquid level control based on the unique and proven principle of a
constantly engaged magnetic field.
The sensor is a weight(displacer) heavier than the liquid, when is suspended by a spring. As liquid level changes the buoyant force generated causes the spring to react(compress or expand)to weight change.
When the spring react, core moves by the rod and displacement movement is reflected in magnet travel, up and down, causing the moving magnet and fixed
magnet to pivot, on or off, according to the inner rod and core position This principle allows adjustment of the switching point by moving the displacer(s) along the suspension cable.
Advantages of displacer controls are that wide
switching differentials can be achieved and higher operating pressures hand
led where traditional float operated units could not.