BRAND : Nohken
FT-2 FT-3 FT-5 FT-7 FT22 FT33 FT55 FT77
FT-2 FT-3 FT-5 FT-7 FT22 FT33 FT55 FT77
The float is designed to have large buoyancy, and the center of the buoyancy is closer to the float bottom and the center of gravity closer to the cable. The float sinks in water when the liquid level is rising (SG = 1). Since the centers of buoyancy and gravity are not at the same point, the float tilts, and the steel ball inside the float rolls, causing the microswitch to close its contacts.
The float operates in a reversed manner when the liquid level is falling, that is, the float tilts the other way and the steel ball returns to its original place, causing the microswitch to open its contacts.