Float Level Switch Operation

The operation of a float switch is based on the buoyancy principle, which states that an object will float if the gravitational downward force is less than the buoyant upward force exerted by the fluid. Multi-level Float Switch. Multi-level float switches can monitor multiple liquid levels within a single device. They use several floats

to accomplish many tasks. Multi-level float switches control pumps, warn of dangerous level and temperature extremes, and keep operators informed of optimal conditions during normal operation. 5-Level Custom Switch Sensor Continuous Level Sensor with Alarm RochesterSensors.com 800-852-9984 email160protected

How New Float Switches Work. Float switches of the 21st century have come much further in the amount of operations your float switch can perform. For example, Water Level Controls is a float switch manufacturer that is revolutionizing the way float switches are used for water level sensing.

Reed float level switches are commonly set as either normally open dry or normally closed dry. As the float on the normally open witches rises with liquid level, the magnets pull the blades of the reed switch together completing the circuit, allowing power to flow to any attached electronics. While the simple premise of operation is the

Magnetrol float level controls use a simple float and magnetic coupling action. As the float rises or falls with liquid level, it moves a magnetic sleeve into or out of the field of a switch actuating magnet, causing switch operation. A non-magnetic barrier tube effectively isolates the switch mechanisms from the controlled liquid.

The operation of a float level switch is straightforward yet effective. The float is typically attached to a rod or stem, which houses the switch mechanism. As the liquid level changes, the float moves accordingly. When the float reaches a specific height, it activates the switch, signaling the need for action, such as stopping a pump or

These switches sense water level in the steam drum of the boiler Float level switch. The Magnetrol float switch mechanism uses a mercury tilt bulb, tilted by a magnet's attraction to a steel rod lifted into position by a float. The float directly senses liquid level, positioning the steel rod either closer to or farther away from the magnet.

When process level falls, the float and the attraction sleeve falls and the bias spring retracts the magnet in a snap action deactivating the electrical switch. This type of float level switch is completely sealed and well suited for heavy duty industrial applications up to 900 psig and 4000C 7500F, meeting ASME code requirements.

Magnetic float level switches can provide level measurement for almost all liquid media. Properly used, float switches can deliver millions of onoff cycles, for years of dependable operation. They are ideal for narrow level differential applications such as high or low level alarms and controls in power plants.

Basics of Float-Type Level Switches Basics of Float-Type Level Switches 2014.7.5000Z No. 2-52, Higashi 2-chome, Nakanocho, Tondabayashi, Osaka, 584-0022, Japan Features of the level switch Operation principle Structure of the reed switch Model nomenclature Features of different models