FLOAT Level Switches
Principle
Float switches come in two main types:
- Fixed Float Switches: These are attached to the walls or top of your vessel and are activated when your liquid rises above them. The float is lifted by the liquid, triggering the switch.
- Suspended Float Switches: These hang from the top of the tank. As the liquid level rises, the float’s orientation changes, triggering the switch.
Advantages
- Suitable for most liquids, including aggressive chemicals (available in plastic).
- Can be installed at the bottom, top, or sides of vessels.
- Simple and easy to maintain.
Disadvantages
- Not suitable for solids.
- Fixed floats can jam if used with coating liquids or liquids with suspended solids.
Considerations
When choosing a float, consider the specific gravity (SG) or density of your liquid. Less dense liquids require lighter floats. A float designed for water may not work properly with lighter liquids like fuels or oils.
