• Shridhan Automation Private Limited

Magnetic Level Indicator - MLI

Shridhan Automation offers Magnetic Level Indicators (MLI) used in applications requiring continuous measurement, indication and control of liquid levels. The design relies on the hydrostatic pressure principle to display tank level in a side mounted measuring chamber. A float, containing a ring magnet, rises and falls with the liquid level in the bypass chamber. This approach allows an all metal construction which eliminates the breakage and leakage problems frequently experienced with glass tube designs. Transmission, visual indication or switching may be achieved by mounting magnetically sensitive devices on the exterior of the bypass chamber. These devices, of two types, track or are activated by the magnet inside the float. Magnetic flapper type: based on the principle of a float inside the liquid, in a communicating bypass chamber flanged to the side of a vessel. The chamber is completely sealed so that the only moving part of the apparatus in contact with the liquid is the float itself. On the dry side of the chamber is the magnetic flapper display, a column of magnetic flappers, which are white on one side and red on the other. As the float moves up or down the bunched field of the permanent magnet mounted in its top section pulls the rollers through a rotation of 180º, thus changing their colour. As the float rises the rollers are turned from white to red, and as the float falls, they are changed back to white again. This means that at any given time the amount of liquid in the tank is constantly represented by a red column without any external power supply. Magnetic capsule type: this is an economy type indicator with equally effective performance. The indicator consists of an encased follower magnet inside a glass tube. The follower magnet is coupled with the float magnet inside the cage and moves along with the float to indicate the correct liquid level. The frame of this indicator is made of aluminium.