Working principle and use
A magnetic level gauge is mounted to the side or the top of a liquid tank with flanges or with thread connections. The device is made of a vertical measuring tube and an exterior measuring column with an indication rail with flaps on it. Each flap is fitted with a permanent magnet and is colored white on one side and red on the other. The tube and the measuring column are both made of non-magnetic material. A custom made float that contains a ring magnet is inserted in the measuring tube. Magnetic level gauges work on the principle of communicating vessels and therefore the level in the tube is equal to the level in the tank. The ring magnet in the float repels the magnets in the flaps. When the float moves up with the liquid surface, the flaps will turn red and indicate the liquid level in the tank. The red colored flaps indicate how much liquid is in the tank and the white colored flaps show which part of the tank is empty and contains gas.
Magnetic level gauges can be used as well to measure the interface level between two liquids in the same tank. They are maintenance free and are unaffected by dust, shocks, vibrations, high temperatures, humidity or even corrosive, acidic substances. As an option the standard level gauge can also be supplied with electronic components such as switches and transmitters like reed chains. In addition the possibility exists to order a magnetic level gauge with a bypass bridle chamber including a radar sensor.