Magnetic float level gauge involve the use of a permanent magnet sealed inside a float whose rise and fall causes the turning of a magnetic roller display.
Magnetic Level Gauge operates on the principle of communicating vessels. The body of chamber is connected adjacent to the tank so that the same conditions of liquid level are obtained in the chamber as those in the tank.
The float is equipped with a system of permanent magnets to transmit level of liquid to the local indicator. The magnet system of the float activates the magnetic roller display according to the liquid level. The column of reversed red magnetic rollers indicates the liquid level.
For magnetic mechanical float, chemical compatibility, temperature, specific gravity (density), buoyancy, and viscosity affect the selection of the body chamber and the float. For example, larger floats may be used with liquids with specific gravities as low as 0.5 while still maintaining buoyancy. The choice of float material is also influenced by temperature-induced changes in specific gravity changes that directly affect buoyancy.
Simple, robust, and solid design Pressure- and gas-proof separation of chamber and display Magnetic Roller Displays without external power supply Several mounting devices: Magnetic switches, Level Sensors, etc Programmable loop-powered control units 4 ... 20 mA available High availability of corrosion resistant materials Application specific designs available Explosion-proof designs