Zenit float switches are specifically for use with submersible pumps and can easily be fitted with counterweights for precise calibration of switching levels.
LEVEL float switches are recommended for installation in large tanks in view of their long strokes, and are suitable for use with soiled liquids. They are multicontact type, and can therefore be connected in "normally closed" or "normally open" configuration, for both filling and emptying functions.
MAC3 float switches are recommended for installation with clear or slightly soiled wastewaters and can be used for emptying only, since they are designed for operation solely in ON/OFF mode.