Normally Open

Views Updated: Dec 15, 2025

Key Facts

Abbreviation
NO
Pronunciation
/ˈnɔrməli ˈoʊpən/
Category
Business
Related Field
General

Examples in Context

  1. Any combination of normally closed, normally open or universal valves may be grouped together.
  2. Normally Open(NO) A contact pair that is open when the relay is not energized.
  3. Safety contacts must be of normally open design only.
  4. The second method uses a small permanent magnet to hold normally open contacts together.
  5. Normally Open(NO) pilot assisted valves operate on a similar principle but with opposite effects from the pressure variations.

Other meanings of NO

Number Gov
Number Of Misc
New Orleans Gov
Norway Regional
Norwegian Regional
New Orleans Saints Misc
Nitric Oxide Academic
National Organization Misc
New Order Misc
National Office Misc