Float Switch

Jerguson® External Cage Float Operated Magnetic Level Switch.                                                                                       Features Tri-Magnet Switching Vibration Resistant Weatherproof Flameproof Sealed (shown) or Flanged Cage Body 316 SS Trim ASME B31.1/B31.3 Design                                                                                                                                                                 Operation The float drives a stainless steel sheathed permanent magnet attached to the float rod in the glandless pressure tube.  As the float rises and falls with a changing liquid level the float assembly moves upwards inside the pressure tube. ?A switch mechanism is mounted inside the enclosure adjacent to the pressure tube, and is activated by the rising or falling magnet. ?The vertical movement of the float magnet in the pressure tube simultaneously actuates the secondary and switch magnets within the switch mechanism, to operate the contacts.  This “three-magnet” system enables the float magnet to pass the switch and actuate switch mechanisms at other levels.  Switch mechanisms which are actuated will not reset until the float magnet actuates the switch mechanism on a falling level. ?Switching is achieved with the unique tri-magnet snap-action switch system.