FFS Float Switches – Ball Type Float Switches from Pepperl + Fuchs. Designed with a highly buoyant ball and to be used with any sequential circuit, because of the buoyancy it is ideally suited to low density liquids. The switch element is mercury free. The float switch is small in diameter, allowing users to fit into tap holes as small as G1. Switching is started by the rocking motion of the sensor. Ball type for high buoyancy Mercury free micro switch with switching ball Density: ≥0.6g/cm 3 Polypropylene float Cable: 5m, 3 x 0.75mm 2 Dimensions: 86mm diameter