Technical Note: Normally Open Vs Closed Float Switches - SMD …
You may need a closed float switch or a configuration that’s normally open. Understanding the differences and why one is preferred is key.
Open vs. Closed Float Switch: Choosing the Right Type
Feb 3, 2025 · If the switch needs to be energized or on, a normally closed float switch is needed. If the switch needs to be de-energized or off, a normally open float switch is needed.
What does “normally open” vs “normally closed” mean for float switches ...
May 14, 2025 · That’s “normally open” A Normally Closed (NC) float switch is the opposite: the circuit is closed (conducting) when the float is down, and rising water opens the circuit to cut power. NC floats …
The Difference Between Normally Open and Normally Closed Float Switches
Sep 9, 2025 · Use a Normally Open float switch if you want equipment to turn on when the liquid rises. Use a Normally Closed float switch if you want equipment to turn off when the liquid rises.
Different Types of Float Switches and What They Do
If the float switch contacts are closed when the float is hanging down it is a Normally Closed (N.C.) switch. If the contacts are open when the float is hanging down it is a Normally Open (N.O.) switch.
The Difference Between Normally Open and Normally Closed Float Switch
Apr 21, 2015 · Find out more about design and application specifications for normally open and normally closed float switches from SMD Fluid Controls.
Normally Open Vs Normally Closed: What Do They Mean?
Aug 18, 2021 · Normally open (NO) and normally closed (NC) are two different terms that are used extensively in the world of electrical components, electronics, and engineering. Understanding what …
Float Switch Guide - Tameson.com
Jan 15, 2025 · You can wire a float switch in either the normally open or closed position. A normally open float switch remains open when down (low liquid level), and a normally closed float switch …
Float Switch: Normally Closed and Normally Opened. - Sino Insts
Nov 4, 2025 · The normally open (NO) and normally closed (NC) states of a float switch describe the default state of its contacts when no external force is applied. In other words, the float is not activated.
Float Switches – Pump Up vs. Pump Down & Normally Open vs. Normally Closed
Aug 1, 2016 · Therefore, a pump down float switch is often used to empty a water tank. The terms ‘Normally Open’ and ‘Normally Closed’ are often used to describe float switches.