The Heart of Liquid Level Control Your 2 Wire Float Switch Wiring Diagram Explained
A 2 Wire Float Switch Wiring Diagram is a straightforward representation of how a simple yet incredibly effective device controls liquid levels. At its core, a float switch is a mechanical switch activated by the rise and fall of liquid. The "2 Wire" designation indicates the most basic configuration, where the switch itself acts as a simple on-off contact, interrupting or completing an electrical circuit. These switches are incredibly versatile and are commonly found in applications such as:- Sump pumps to automatically remove excess water
- Water tanks to maintain a desired water level
- Industrial machinery for process control
- Boilers to prevent dry running
| Operation | Description |
|---|---|
| Normally Open (NO) | The switch circuit is open (off) when the float is in its lowest position and closes (on) when the liquid level rises and lifts the float. This is ideal for turning on pumps when water is high. |
| Normally Closed (NC) | The switch circuit is closed (on) when the float is in its lowest position and opens (off) when the liquid level rises and lifts the float. This is useful for stopping equipment when a tank is full. |