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Animation How It Works Level Measurement Switches

Float Level Switch Working Principle Animation

All float-operated liquid level switches operate on the buoyancy principle: “the buoyant force acting on an object is equal to the mass of liquid displaced by the object”.

As a result, the partially submerged float moves with the level of the liquid in the vessel. Floats are most-commonly used for narrow level differential applications such as high level and low level alarms.

Level Float Switch Working Principle Animation

The Float level switches use a float containing an internal magnet and a stem with an encapsulated, hermetically-sealed reed switch.

As the float rises and falls with the liquid level, its internal magnet causes the switch circuit to open and close. The non-magnetic stem isolates it from the process.

Float Level Switch Working

Float-type level controls are available for top mounting, side mounting and external chamber applications. Single and multi-level models are used to monitor preset liquid or liquid interface levels.

Optional internal thermostats and RTD’s also monitor process temperature within the same sensor.

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