FLOWTECH Displacer Type Level Switch works on Force Balance Principle. Displacer is suspended by a spring. When liquid level rises and covers the displacer, it becomes lighter and the spring relaxes. This causes a small upward movement of the rod assembly inside the casing which activates the magnetically operated micro switch. Magnetically linked float & switch design providers a glandless Connection & ensure a leak free design. Such switches can handle liquids with have specific gravity as low as 0.5