Principle of Operation
These models consists of Red or Black/white magnetic rollers equipped with small rod
magnets which are rotated one after another at an angle of 180 by the magnetic field of
the permanent magnet put inside the float. The rollers change from white to red on
rising level and red to white on falling level. Plastic rollers are suitable for liquid
temperature upto 100C & Alluminium rollers for temperature upto 250C and ceramic rollers
for temperature upto 450C.
The level in a tank or agitating machine is permanently indicated as a Red or Black
column even in the case of power fallure.
In addition, Level Sensing elements can be fixed directly to the float cage, so
that-simultaneous, contact less sensing is measured electrically. Electronic Level
indicator with set point can be connected with the sensor to have reading in remote.
Single or double set point relays can also be provided in the electronic indicator for
control purposes.