for submersible pump, pump float level switch for pool Cable float level switch

What is the brief introduction of cable float level switches?                                                       

Float switch make use of micro switch as contact component. The switch will have ON or OFF contact signal output when the angle is larger than 28 Degree.  Float switch make use of mercury switch as contact component. When liquid lift up to contact float, the float will have variable angles. The switch will have ON or OFF contact signal output when the angle is larger than 10 Degree.

What 's the main parameters of  Cable float level controller ?