FFS Float Switch – Ball Type, Intrinsically Safe Namur Output Ball type float switch. Intrinsically Safe NAMUR Output Closes Floating Up (make switch) Polypropylene Float Density: ≥0.6g/cm 3 5 Metres PVC (2 x 0.75mm 2 ) Cable Can Only Be Used With a Galvanic Isolation Barrier Operating temperature range PVC cable -20 to +70°C, PUR cable -20 to +85°C, CSM cable -20 to +100°C Density ≥0.6g/cm 3 Float material Polypropylene Cable Dimensions 2 x 0.75m 2 PVC cable applications Water, waste water, aggressive liquids PUR cable applications Fuels and greasy liquids CSM cable applications Acids and alkalis Dimensions 86mm dia